Chapt
Name:
Date:
er
Number
2 Whole
Multiplication and Division
Practice 1 Using a Calculator
© 2009 Marshall Cavendish International (Singapore) Private Limited
Add.
1.
215 9,843 2.
6,789 18 3.
97 8,154 4.
1,693 8,157 Subtract.
5.
8,215 79 6.
6,286 129 7.
2,159 1,998 8.
26,145 9,354 Multiply.
9.
359 12 10.
217 58 11.
1,975 5 =
12.
7,050 8 Divide.
13.
504 9 14.
4,104 6 15.
8,160 85 16.
17,604 18 Lesson 2.1 Using a Calculator
G5_WB_Ch02.indd 27
27
1/12/09 6:23:41 PM
Only one path after each problem has the correct answer.
Trace Flavio’s path by choosing the paths with the correct answers.
Flavio
17.
75 16
1,2
00
0
12
15,488
© 2009 Marshall Cavendish International (Singapore) Private Limited
968 16
4
1,04
1,498
1,625 127
1,752
80
3,0
336
1,708 1,372
4
,78
22
16
,37
2
712 32
5
3,1
25
125 25
The prize at the end of Flavio’s path is:
28
G5_WB_Ch02.indd 28
Chapter 2
a
Whole Number Multiplic
tion and Division
1/12/09 6:23:42 PM
Name:
Date:
Practice 2
Multiplying by Tens, Hundreds,
or Thousands
© 2009 Marshall Cavendish International (Singapore) Private Limited
Multiply.
1.
47 10 2.
38 10 3.
109 10 4.
521 10 5.
7,140 10 6.
1,503 10 7.
3,702 10 8.
9,342 10 Find the missing factors.
9.
96 11.
514 13.
308 15.
2,096 960
10.
10 700
5,140
12.
10 5,000
3,080
14.
10 4,020
20,960 16.
Lesson 2.2
G5_WB_Ch02.indd 29
10 91,760
Multiplying by Tens, Hundreds, or Thousands
29
1/12/09 6:23:44 PM
Complete.
Example
4
65 40 (65 260
2,600
10
39 30
18.
) 10
(39 (143 10
19.
20.
)
(360 G5_WB_Ch02.indd 30
Chapter 2
285 80
(285 30
)
360 30
143 90
© 2009 Marshall Cavendish International (Singapore) Private Limited
17.
) 10
)
a
Whole Number Multiplic
tion and Division
1/12/09 6:23:44 PM
Name:
Date:
© 2009 Marshall Cavendish International (Singapore) Private Limited
Multiply.
21.
7 1,000 R
22.
86 100 T
23.
70 1,000 A
24.
95 100 E
25.
400 1,000 L
26.
217 100 P
27.
726 1,000 I
28.
803 100 S
29.
8,032 1,000 O
30.
3,810 100 B
31.
3,936 1,000 N
What cat has long, fine hair, and a snubbed nose?
Write the letters that match the answers below to find out.
21,700
9,500
7,000
80,300
726,000
Lesson 2.2
G5_WB_Ch02.indd 31
70,000 3,936,000
Multiplying by Tens, Hundreds, or Thousands
31
1/12/09 6:23:44 PM
Find the missing factors.
32.
1,700
17 1,000 478,000 35.
34.
1,000 25,000
33.
320 320,000
36.
1,315 131,500 37.
1,000 2,662,000
38.
4,668 466,800 39.
100 576,000
Example
4 300 (4 40.
12
1,200
12 500 (12 3
) 100
100
) 100
© 2009 Marshall Cavendish International (Singapore) Private Limited
Complete.
100
41.
700 900 (700 ) 100
100
32
G5_WB_Ch02.indd 32
Chapter 2
a
Whole Number Multiplic
tion and Division
1/12/09 6:23:45 PM
Name:
Date:
Complete.
42.
814 700
43.
) 100
(814 (5,400 100
5 7,000
© 2009 Marshall Cavendish International (Singapore) Private Limited
(5 45.
) 1,000
1,000
47.
) 1,000
1,000
49.
) 1,000
1,000
1,000
663 6,000
(663 ) 1,000
1,000
Lesson 2.2
G5_WB_Ch02.indd 33
) 1,000
300 4,000
(300 1,000
15 2,000
(15 48.
) 1,000
12 3,000
(12 100
8 5,000
(8 46.
) 100
44.
5,400 800
Multiplying by Tens, Hundreds, or Thousands
33
1/12/09 6:23:45 PM
Multiply.
50.
51.
52.
53.
54.
Multiplying
by Hundreds
Multiplying
by Thousands
17 70
17 700
17 7,000
65 30
65 300
65 3,000
90 40
90 400
90 4,000
812 10
812 100
812 1,000
634 20
634 200
634 2,000
© 2009 Marshall Cavendish International (Singapore) Private Limited
Multiplying
by Tens
Find the missing factors.
55.
31 3,100
56.
30 90,000
57.
103 3,090
58.
25 34
G5_WB_Ch02.indd 34
Chapter 2
5,000
a
Whole Number Multiplic
tion and Division
1/12/09 6:23:45 PM
Name:
Date:
The owner of an electronics store wants to estimate the amount she will receive
from the sales of these items:
© 2009 Marshall Cavendish International (Singapore) Private Limited
58 all-in-one printers at $219 each.
652 radio clocks at $73 each.
99 portable audio players at $217 each.
39 plasma television sets at $4,156 each.
Estimate the amount she receives for each type of item by rounding to the
greatest place value. Then, estimate the total amount from the sales
of the items.
59.
58 $219 rounds to
$
$
60.
652 $73 rounds to
$
$
61.
99 $217 rounds to
$
$
62.
39 $4,156 rounds to
63.
The total estimated amount is
$
$
$
$
$
$
$
Lesson 2.2
G5_WB_Ch02.indd 35
Multiplying by Tens, Hundreds, or Thousands
35
1/12/09 6:23:45 PM
Multiply. Explain how you can check if your answer is reasonable.
© 2009 Marshall Cavendish International (Singapore) Private Limited
184 97
36
G5_WB_Ch02.indd 36
Chapter 2
a
Whole Number Multiplic
tion and Division
1/12/09 6:23:58 PM
Name:
Date:
Practice 3
Multiplying by 2-Digit Numbers
Multiply. Estimate to check if your answers are reasonable.
Example
43 20 (43 × 2) × 10
= 86 × 10
43
20
×
or
860
= 860
43 rounds to 40.
© 2009 Marshall Cavendish International (Singapore) Private Limited
40 × 20 = 800
The answer is reasonable.
1.
59 40 2.
91 14 3.
96 15 4.
23 17 Lesson 2.3
G5_WB_Ch02.indd 37
Multiplying by 2-Digit Numbers
37
1/12/09 6:23:58 PM
Multiply. Estimate to check if your answers are reasonable.
Example
510 30 (510 × 3) × 10
= 1,530 × 10
or
×
5 1 0
30
1 5, 3 0 0
= 15,300
510 rounds to 500.
500 × 30 = 15,000
5.
750 60 6.
614 31 7.
556 47 8.
843 25 38
G5_WB_Ch02.indd 38
Chapter 2
a
Whole Number Multiplic
© 2009 Marshall Cavendish International (Singapore) Private Limited
The answer is reasonable.
tion and Division
1/12/09 6:23:58 PM
Name:
Date:
Multiply. Estimate to check if your answers are reasonable.
Example
1,970 20 (1,970 × 2) × 10
= 3,940 × 10
or
1, 9 7 0
×
20
3 9, 4 0 0
= 39,400
1,970 rounds to 2,000.
2,000 × 20 = 40,000
© 2009 Marshall Cavendish International (Singapore) Private Limited
The answer is reasonable.
9.
3,610 60 10.
8,142 16 11.
5,193 35 12.
4,563 29 Lesson 2.3
G5_WB_Ch02.indd 39
Multiplying by 2-Digit Numbers
39
1/12/09 6:23:58 PM
13.
85 35 14.
78 21 15.
738 96 16.
921 57 17.
3,072 82 18.
7,846 63 40
G5_WB_Ch02.indd 40
Chapter 2
a
Whole Number Multiplic
© 2009 Marshall Cavendish International (Singapore) Private Limited
Multiply. Estimate to check if your answers are reasonable.
tion and Division
1/12/09 6:23:58 PM
Name:
Date:
Jodi estimated these products.
a. 2,892 21 rounds to 3,000 20 60,000
b. 2,743 18 rounds to 3,000 20 60,000
She then worked out the actual answers. Even though the estimated answers were
the same, Jodi found that the actual answers were very different from each other.
In which case is the estimate closer to the actual answer?
Explain why.
© 2009 Marshall Cavendish International (Singapore) Private Limited
1.
Chapter 2
G5_WB_Ch02.indd 41
Whole Number Multiplication and Division
41
1/12/09 6:23:58 PM
If an estimate does not make your answer seem reasonable, what can you
do to make sure you have done your work correctly?
© 2009 Marshall Cavendish International (Singapore) Private Limited
2.
42
G5_WB_Ch02.indd 42
Chapter 2
a
Whole Number Multiplic
tion and Division
1/12/09 6:23:58 PM
Name:
Date:
Practice 4
Dividing by Tens, Hundreds,
or Thousands
Complete.
1.
100 10 3.
1,050 5.
52,260 10 2.
105
670 10 10 1,974
4.
6.
30,500 7.
3,000 60
3,050
© 2009 Marshall Cavendish International (Singapore) Private Limited
Complete.
Example
5,610 30
(5,610 8.
10
)3
(3,000 10) 561
3
6
187
U
M
1,040 40
)
(1,040 A
Lesson 2.4
G5_WB_Ch02.indd 43
Dividing by Tens, Hundreds, or Thousands
43
1/12/09 6:23:58 PM
Complete.
8,700 60
)
(8,700 T
10.
3,450 50
)
(3,450 R
11.
© 2009 Marshall Cavendish International (Singapore) Private Limited
9.
34,230 70
)
(34,230 N
Which U.S. president had a sign on his desk that said ‘The buck stops here’?
Write the letters on pages 43 and 44 that match the answers below to find out.
HARRY S.
145
44
G5_WB_Ch02.indd 44
Chapter 2
69
a
Whole Number Multiplic
187
50
26
489
tion and Division
1/12/09 6:23:58 PM
Name:
Date:
© 2009 Marshall Cavendish International (Singapore) Private Limited
Divide.
12.
3,400 100 P
13.
560,000 1,000 H
14.
5,000 100 S
15.
38,000 1,000 I
16.
7,700 100 N
17.
360,000 1,000 M
18.
2,000 100 B
19.
415,000 1,000 A
To which class of animals does the salamander belong?
Write the letters that match the answers below to find out.
415
360
34
560
38
20
Lesson 2.4
G5_WB_Ch02.indd 45
38
415
77
Dividing by Tens, Hundreds, or Thousands
50
45
1/12/09 6:23:58 PM
Complete.
Example
600 300
20.
(600 100 ) 6
2
(1,600 3
)
81,000 900
22.
)
(81,000 31,500 500
(31,500 )
Complete.
Example
9,000 3,000
23.
(9,000 1,000 ) 24.
9
3
3
25.
)
G5_WB_Ch02.indd 46
120,000 8,000
(120,000 Chapter 2
)
(133,000 46
(56,000 3
133,000 7,000
56,000 7,000
© 2009 Marshall Cavendish International (Singapore) Private Limited
21.
3
1,600 400
)
a
Whole Number Multiplic
tion and Division
1/12/09 6:23:58 PM
Name:
Date:
Divide.
Dividing by
Tens
26.
© 2009 Marshall Cavendish International (Singapore) Private Limited
27 .
28 .
29 .
Dividing
by Hundreds
Dividing
by Thousands
360 40
3,600 400
36,000 4,000
1,190 70
11,900 700
119,000 7,000
12,680 20
126,800 200
1,268,000 2,000
23,200 80
232,000 800
2,320,000 8,000
Complete.
43
30.
430 31.
9,000 30
32.
49,000 7
33.
2,400 120
34.
64,000 160
35.
85,000 17
Lesson 2.4
G5_WB_Ch02.indd 47
Dividing by Tens, Hundreds, or Thousands
47
1/12/09 6:23:58 PM
Estimate each quotient.
Example
30
200
36.
7,865 41 rounds to
37.
9,125 345 rounds to
38.
9,825 206 rounds to
39.
7,226 871 rounds to
40.
5,299 49 rounds to
41.
3,654 27 rounds to
What number can be evenly divided by 3, 7, and 9?
Color the numbers below that match the answers above to find out.
500
7,
00
0
5
80
90
3
12
0
1,00
G5_WB_Ch02.indd 48
Chapter 2
a
Whole Number Multiplic
50
800
100
8
120
48
600
200
30
60
400
© 2009 Marshall Cavendish International (Singapore) Private Limited
6,000
6,452 27 rounds to
300
700
70
10
tion and Division
1/12/09 6:23:58 PM
Name:
Date:
Practice 5
Dividing by 2-Digit Numbers
Divide.
Example
340 20 34 ÷ 2
1.
560 80 © 2009 Marshall Cavendish International (Singapore) Private Limited
= 17
2.
630 60 3.
590 30 4.
190 90 5.
360 50 Lesson 2. 5 Dividing by 2-Digit Numbers
G5_WB_Ch02.indd 49
49
1/12/09 6:23:59 PM
Divide.
Example
43 12
6.
98 16 8.
94 37 3 R7
12 4 3
3 6
7
43 ÷ 12 = 3 R 7
7.
50
G5_WB_Ch02.indd 50
65 24 Chapter 2
a
Whole Number Multiplic
© 2009 Marshall Cavendish International (Singapore) Private Limited
12 rounds to 10.
4 × 10 = 40
The quotient is about 4.
4 × 12 = 48
The estimated quotient is
too big. Try 3.
tion and Division
1/12/09 6:23:59 PM
Name:
Date:
Divide.
Example
215 51
215 rounds to 200.
4 × 50 = 200
The quotient is about 4.
4 R 11
51 2 1 5
© 2009 Marshall Cavendish International (Singapore) Private Limited
2 04
1 1
215 ÷ 51 = 4 R 11
9.
362 60 10.
178 45 11.
850 88 12.
273 59 Lesson 2.5 Dividing by 2-Digit Numbers
G5_WB_Ch02.indd 51
51
1/12/09 6:23:59 PM
Divide.
Example
354 14
2 5R4
14 3 5 4
2 8
7 4
7 0
3 hundreds 5 tens = 35 tens
35 tens ÷ 14 = 2 tens R 7 tens
7 tens 4 ones = 74 ones
74 ÷ 14 = 5 R 4
4
13.
850 17 14.
546 25 15.
700 28 16.
936 43 52
G5_WB_Ch02.indd 52
Chapter 2
a
Whole Number Multiplic
© 2009 Marshall Cavendish International (Singapore) Private Limited
354 ÷ 14 = 25 R 4
tion and Division
1/12/09 6:23:59 PM
Name:
Date:
Divide.
Example
3,300 30
17.
7,500 60 1 1 0
3 0 3, 3 0 0
30
30
30
© 2009 Marshall Cavendish International (Singapore) Private Limited
0
3,300 ÷ 30 = 110
18.
9,607 15 19.
5,007 18 20.
3,215 22 21.
8,012 46 Lesson 2.5 Dividing by 2-Digit Numbers
G5_WB_Ch02.indd 53
53
1/12/09 6:23:59 PM
9
7
6
2
0
3
5
1
4
Choose 5 problems below and circle them. Work out the problems
you chose. Find those remainders in the grid. Cross them out.
Did you win the game?
22.
27 12
23.
58 19
24.
457 28
25.
406 25
26.
518 43
27.
642 58
28.
6,900 75
29.
1,286 21
30.
2,995 83
54
G5_WB_Ch02.indd 54
Chapter 2
a
Whole Number Multiplic
© 2009 Marshall Cavendish International (Singapore) Private Limited
Play tic-tac-toe using the exercises below .
tion and Division
1/12/09 6:23:59 PM
Name:
Date:
Practice 6
Order of Operations
Simplify. Record each step.
Example
18 11 4 © 2009 Marshall Cavendish International (Singapore) Private Limited
2.
3
26 8 19 1.
Step 1
18 − 11 = 7
Step 1
Step 2
7−4=3
Step 2
12 16 9 3 58 23 11 6 3.
Step 1
Step 1
Step 2
Step 2
Step 3
Step 3
Simplify. State the order in which you performed the operations.
Order of Operations Performed
Numeric Expression
12 14 9 = 35
4.
60 18 7
5.
70 15 49
6.
23 16 7 12
7.
15 12 17 6
First
Second
+
+
Third
Lesson 2.6 Order of Operations
G5_WB_Ch02.indd 55
55
1/12/09 6:23:59 PM
Simplify. Record each step.
Example
9.
27
25 3 5 8.
Step 1
9 × 6 = 54
Step 1
Step 2
54 ÷ 2 = 27
Step 2
200 10 3 5 10.
250 5 10 2 Step 1
Step 1
Step 2
Step 2
Step 3
Step 3
Simplify. State the order in which you performed the operations.
Order of Operations Performed
Numeric Expression
30 2 5 = 300
11.
6 10 5
12.
28 7 4
13.
40 8 5
14.
20 10 8 2
15.
120 12 2 16
56
G5_WB_Ch02.indd 56
Chapter 2
a
Whole Number Multiplic
First
Second
×
×
© 2009 Marshall Cavendish International (Singapore) Private Limited
962
Third
tion and Division
1/12/09 6:23:59 PM
Name:
Date:
Simplify. Record each step.
Example
786
© 2009 Marshall Cavendish International (Singapore) Private Limited
17.
50
14 9 7 16.
Step 1
7 × 8 = 56
Step 1
Step 2
56 − 6 = 50
Step 2
200 20 5 80 16 4 18.
Step 1
Step 1
Step 2
Step 2
Simplify. State the order in which you performed the operations.
Order of Operations Performed
Numeric Expression
25 5 3 = 10
19.
90 16 8
20.
83 72 6
21.
5 90 7
22.
240 20 15
23.
7 80 160
First
Second
×
−
Lesson 2.6 Order of Operations
G5_WB_Ch02.indd 57
57
1/12/09 6:24:00 PM
Simplify. Record each step.
Example
89
54 6 20 4 54 ÷ 6 = 9
Step 2
20 × 4 = 80
Step 3
9 + 80 = 89
40 6 10 3 © 2009 Marshall Cavendish International (Singapore) Private Limited
24.
Step 1
Step 1
Step 2
Step 3
25.
36 6 25 5 Step 1
Step 2
Step 3
26.
25 4 36 9 Step 1
Step 2
Step 3
58
G5_WB_Ch02.indd 58
Chapter 2
a
Whole Number Multiplic
tion and Division
1/12/09 6:24:00 PM
Name:
Date:
Simplify. State the order in which you performed the operations.
Order of Operations Performed
Numeric Expression
© 2009 Marshall Cavendish International (Singapore) Private Limited
60 3 14 2 = 48
27.
20 5 2 6
28.
13 6 2 12 4
29.
27 3 40 6
30.
64 60 12 3
31.
42 7 2 7
First
Second
Third
÷
×
+
Fourth
Simplify. Record each step.
Example
(15 11) 9 32.
36
Step 1
15 – 11 = 4
Step 2
4 × 9 = 36
(11 5) 16 Step 1
Step 2
Lesson 2.6 Order of Operations
G5_WB_Ch02.indd 59
59
1/12/09 6:24:00 PM
Simplify. Record each step.
33.
63 (9 7) Step 1
Step 2
34.
32 (14 2) Step 2
Simplify. State the order in which you performed the operations.
Order of Operations Performed
Numeric Expression
3 (72 8) = 27
35.
(40 5) 11
36.
(36 15) 2
37.
36 (15 2)
38.
(62 10) 6
39.
70 (16 9)
60
G5_WB_Ch02.indd 60
Chapter 2
a
Whole Number Multiplic
First
Second
(÷)
×
© 2009 Marshall Cavendish International (Singapore) Private Limited
Step 1
tion and Division
1/12/09 6:24:00 PM
Name:
Date:
Simplify. Record each step.
Example
© 2009 Marshall Cavendish International (Singapore) Private Limited
21 (12 6) 3 40.
Step 1
12 + 6 = 18
Step 2
18 ÷ 3 = 6
Step 3
21 + 6 = 27
27
7 (8 4) 10 Step 1
Step 2
Step 3
41.
32 (7 1) 9 5 Step 1
Step 2
Step 3
Step 4
Lesson 2.6 Order of Operations
G5_WB_Ch02.indd 61
61
1/12/09 6:24:00 PM
Simplify. Record each step.
42.
(47 12) 10 5 3 Step 1
Step 2
Step 3
Simplify. State the order in which you performed the operations.
Order of Operations Performed
Numeric Expression
100 (720 200) 2
= 560
43.
24 5 (125 80)
44.
360 (98 22) 19 30
45.
11 (34 16) 5
46.
7 6 (18 6)
47.
21 (2 5) 12 8
62
G5_WB_Ch02.indd 62
Chapter 2
a
Whole Number Multiplic
First
Second
Third
(+)
÷
+
Fourth
© 2009 Marshall Cavendish International (Singapore) Private Limited
Step 4
tion and Division
1/12/09 6:24:00 PM
Name:
Date:
Practice 7 Real-World Problems: Multiplication
and Division
Solve. Show your work.
© 2009 Marshall Cavendish International (Singapore) Private Limited
1.
2.
Rafael has 118 baseball cards arranged in an album. Each page of
the album can hold 9 cards. How many pages are full and how
many cards are on the last page?
A ski club had 146 members. Each member paid $30 a month for
training fees. How much did the club collect in fees for the year?
Lesson 2.7
G5_WB_Ch02.indd 63
n
Real-World Problems: Multiplication and Divisio
63
1/12/09 6:24:00 PM
3.
A farmer collects 1,250 eggs on a morning. She puts 30 eggs on each
tray. How many egg trays does she need to hold all the eggs?
4.
At a supermarket, pineapple juice sells at $1 per pint (16 ounces).
Greg wants to buy eighteen 40-ounce cans of pineapple juice
from the supermarket. How much does he have to pay altogether?
64
G5_WB_Ch02.indd 64
Chapter 2
a
Whole Number Multiplic
© 2009 Marshall Cavendish International (Singapore) Private Limited
Solve. Show your work.
tion and Division
1/12/09 6:24:00 PM
Name:
Date:
Solve. Show your work.
A charitable organization spends $4,500 giving out food vouchers
to families.
5.
a.
Each family receives one voucher worth $25. How many families
are there?
© 2009 Marshall Cavendish International (Singapore) Private Limited
b. Each voucher will be worth $32 next year. How much more money
will the charity need next year?
6.
A group of tourists visits an art museum. The admission is $13 for each adult
and $7 for each child. There are 10 adults and 18 children in the group.
How much do they pay altogether?
Lesson 2.7
G5_WB_Ch02.indd 65
n
Real-World Problems: Multiplication and Divisio
65
1/12/09 6:24:00 PM
Solve. Show your work.
The length of a rectangular board is 10 centimeters longer than its
width. The width of the board is 26 centimeters. The board is cut
into 9 equal pieces.
a.
What is the area of each piece?
b. What are the possible dimensions of each piece?
(Take the dimensions to be whole numbers.)
8.
66
G5_WB_Ch02.indd 66
There are 912 yellow chairs and blue chairs altogether in an
auditorium. The blue chairs are arranged in 36 rows with
12 chairs in each row. The yellow chairs are arranged in rows
of 20. How many rows of yellow chairs are there?
Chapter 2
a
Whole Number Multiplic
© 2009 Marshall Cavendish International (Singapore) Private Limited
7.
tion and Division
1/12/09 6:24:00 PM
Name:
Date:
Solve. Show your work.
The table shows the wages of workers in Siva’s company. Siva works
from Tuesday through Sunday each week. How much does he earn
in 1 week?
Weekdays
$186 per day
Saturday and Sunday
$248 per day
© 2009 Marshall Cavendish International (Singapore) Private Limited
9.
Lesson 2.7
G5_WB_Ch02.indd 67
n
Real-World Problems: Multiplication and Divisio
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Solve. Show your work.
The table shows the charges at a parking garage.
First hour
$8
Every additional 21 hour
$3
a.
Sharona parked her car at the garage from 9:30 A.M. to 11 A.M. on
the same day. How much did she have to pay?
b. Daryll parked his car there from 9 A.M. to 12:30 P.M. on the same day.
How much did he have to pay?
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a
Whole Number Multiplic
© 2009 Marshall Cavendish International (Singapore) Private Limited
10.
tion and Division
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Name:
Date:
Practice 8 Real-World Problems: Multiplication
and Division
© 2009 Marshall Cavendish International (Singapore) Private Limited
Solve. Use any strategy.
1.
Hannah and Francine have $120. Hannah and Peter have $230. Peter has
6 times as much money as Francine. How much money does Hannah have?
2.
Larry is 10 years old and his sister is 7 years old. In how many years’ time
will their total age be 25 years?
Lesson 2.7
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Solve. Use any strategy.
A box of chalk and 2 staplers cost $10. Three boxes of chalk
and 2 staplers cost $18. Find the total cost of 1 box of chalk
and 1 stapler.
© 2009 Marshall Cavendish International (Singapore) Private Limited
3.
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a
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tion and Division
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Name:
Date:
Solve. Use any strategy.
Sally and Marta had the same number of postcards. After Sally sold
18 of her postcards, Marta had 4 times as many postcards as Sally.
How many postcards did each girl have to begin with?
© 2009 Marshall Cavendish International (Singapore) Private Limited
4.
Lesson 2.7
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Solve. Use any strategy.
A basket with 12 apples has a mass of 3,105 grams. The same
basket with 7 apples has a mass of 1,980 grams. Each apple
has the same mass. What is the mass of the basket?
© 2009 Marshall Cavendish International (Singapore) Private Limited
5.
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Name:
1.
Date:
Kelly has a 370-page sketch book. She wants to allocate an equal
number of pages for making sketches to each month of the year.
She uses division to find the number of pages she can possibly allocate
to each month, and the number of pages she will have left over.
She works out the division like this:
© 2009 Marshall Cavendish International (Singapore) Private Limited
30
12 3 7 0
360
10
Which part of the answer tells the number of pages that Kelly can
possibly allocate to each month?
Which part tells the number of pages left over?
Chapter 2
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2.
Mark was asked to simplify the numeric expression 6 4 2.
He worked out the steps like this:
6 4 2 10 2
20
3.
Look at the following problem and the solution given by a student:
Abel, Belle, and Cindy have $408 altogether. Belle has $7 more
than Cindy and $5 more than Abel. How much does Abel have?
?
$5
Abel
$408
Belle
Cindy
$408 $7 $5 $396
$396 3 $132
$132 $5 $137
© 2009 Marshall Cavendish International (Singapore) Private Limited
Is he correct? Explain why.
$7
What was the mistake made? What should the correct answer be?
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tion and Division
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Name:
Date:
Put On Your Thinking Cap!
© 2009 Marshall Cavendish International (Singapore) Private Limited
Solve. Use any strategy.
1.
A sticker costs 15¢, and a packet of 8 similar stickers costs $1.
Clement buys 37 stickers. What is the least amount of money
that Clement spends on the stickers?
2.
Forty members of a parents’ organization are making candles to raise
money. One member drops out and the rest have to make 3 more
candles each to make up. Each member makes the same number
of candles. How many candles do they make altogether?
Chapter 2
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3.
Mr. Thomas puts up fence posts from one end of a field to the other,
equal distances apart. There are 27 posts. The width of each post
is 10 centimeters. The distance between two posts is 30 meters.
Find the length of the fence.
4.
Kirsten has 64 coins in her piggy bank. She has $9.25 in dimes and
quarters. How many dimes and how many quarters does she have?
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a
Whole Number Multiplic
© 2009 Marshall Cavendish International (Singapore) Private Limited
Solve. Use any strategy.
tion and Division
1/12/09 6:24:02 PM
Name:
Date:
Put On Your Thinking Cap!
© 2009 Marshall Cavendish International (Singapore) Private Limited
Solve. Use any strategy.
1.
Darcy, Jason, and Maria share $268. Jason has $20 more than Darcy
and Maria has twice as much money as Jason. How much money do
Darcy and Jason have altogether?
2.
Juan and Rachel have the same number of marbles. Rachel gives
away 10 marbles and Juan gives away 22 marbles. Rachel then has
3 times as many marbles as Juan. How many marbles did each of
them have at first?
Chapter 2
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Solve. Use any strategy.
Gerry had a total of 30 pens and pencils. He decided to trade all his
pens with his friends for pencils. If he traded every pen for 2 pencils,
he would have 48 pencils in all. How many pens and how many
pencils did he have before the trade?
© 2009 Marshall Cavendish International (Singapore) Private Limited
3.
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a
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