CCSS
Add, subtract,
multiply,
and divide
decimals tomultiplication,
hundredths, using
NS 3.3G5.NBT.7
Solve problems
involving
addition,
subtraction,
and
concrete models or drawings and strategies based on place value,
division of money amounts in decimal notation and multiply and
properties of operations, and/or the relationship between addition and
money
amounts
in decimal
notation
subtraction; divide
relate the
strategy
to a written
method and
explainby
theusing wholenumber multipliers and divisors.
reasoning used.
UNDERLYING SKILLS AND CONCEPTS:
divide whole numbers;
write equations for word
problems; division basic facts
Divide Money Amounts
a
K
ey Ide
When you divide money
amounts, you can divide like you
do with whole numbers.
Then place the dollar sign and decimal
point to show the dollars and cents.
F
or
!
me
For
me!
E x am p l E
Step 1
Divide the tens.
How many 6s can
you take out of 15?
247
75
6 1540
00
535
235
Step 1
Divide again.
How many 6s can
you take out of 30?
Step 2
Multiply.
6 2 12
237
75
6 1500
00
12535
1235
1225
Step 205
Multiply.
6 5 30
Step 3
Subtract.
15 12 3
237
75
6 1500
00
12535
3235
1225
Step 05
3
Subtract.
30 30 0
2575
2575
2575
6 1500
00
6 1500
00
6 1500
00
12535
12535
12535
3035
3035
3035
3025
1225
3025
005
005
005
The phone call cost $0.25 a minute.
page 246
Step 4
Are there more?
Bring down the
next digit.
2 75
6 1500
00
12535
3035
1225
Step 4
005
Add:
the dollar sign and
the decimal point.
$0.2575
6 1500
00
12535
3035
3025
005
Chapter 21 – Lesson 3
C – © CSL Associates, Inc. All rights reserved.
Raul talked on the phone 6 minutes.
The call cost $1.50. How much did 1 minute cost?
Find $1.50 6.
Divide as with whole numbers.
Then place the dollar sign and the decimal point in the quotient.
Name
P RAC T I C E
Divide.
$2.22
$1.26
1. 4 $
8
.8
8
2. 6 $
7
.5
6
$0.28
$1.13
4. 7 $
1
.9
6
5. 3 $
3
.3
9
$1.85
$1.07
C – © CSL Associates, Inc. All rights reserved.
7. 5 $
9
.2
5
8. 7 $
7
.4
9
$1.20
3. 5 $
6
.0
0
$1.50
6. 6 $
9
.0
0
$2.50
9. 4 $
1
0
.0
0
Solve. Explain how you got your answer.
12. Five friends want to share
10. How many quarters are there
$12.50. Daesun says that each
in $11.75?
person should get $2.50.
47; multiply 11 by 4.
Is he correct?
Then add 3 more quarters.
Explain how you decided.
11. How many nickels are there in
Yes. $12.50 5 $2.50
$3.15?
63; 315 5 63
Math
Reasoning
Money
MR 3.1
13. Amanda wants to buy 6 presents. She has $10.
Which price range should she use for each present? Explain.
A.
between $1.50 and $2
B.
between $2 and $3
C.
between $1.00 and $1.50
D. between $6.00 and $10.00
Chapter 21 – Lesson 3
C. $9 divided by 6 is $1.50.
The other choices would be
too much money.
page 247
MCX94.HW.CL.G3.FM&Lesson.v211
8/3/04
13:56
Page 166
Name
P RAC T I C E
…at home!
Divide.
$1.45
1. 3 $
9
.9
9
$2.10
2. 6 $
8
.7
0
$0.62
3. 4 $
8
.4
0
$2.23
4. 7 $
4
.3
4
$1.20
5. 3 $
6
.6
9
$1.65
6. 6 $
7
.2
0
$1.07
7. 5 $
8
.2
5
$2.75
8. 7 $
7
.4
9
9. 4 $
1
1
.0
0
Solve. Explain how you got your answer.
12. Six friends want to share $15.00.
10. How many quarters are there
Rory says that each person
in $12.25?
should get $2.50.
49; multiply 12 by 4.
Is he correct?
Then add 1 more quarter.
Explain how you decided.
11. How many nickels are there in
Yes. $15.00 6 $2.50
$3.25?
65; 325 5 65
Math
Reasoning
Money
MR 3.1
13. Marjorie wants to buy 4 presents. She has $10.
Which price range should she use for each present? Explain.
A.
between $1.50 and $2
B.
between $2 and $2.50
C.
between $1.00 and $1.50
B. $10 divided by 4 is $2.50.
D. between $6.00 and $10.00
page 166
Home Resource and Homework
Chapter 21 Lesson 3
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$3.33
MCX94TEG3Ch01_32.v8.9.3 2/21/01 14:49 Page 455
Name
P RAC T I C E
Divide.
$2.22
$1.26
1. 4 $
8
.8
8
2. 6 $
7
.5
6
$0.28
3. 5 $
6
.0
0
$1.13
4. 7 $
1
.9
6
$1.50
5. 3 $
3
.3
9
$1.85
6. 6 $
9
.0
0
$1.07
7. 5 $
9
.2
5
C – © CSL Associates, Inc. All rights reserved.
$1.20
$2.50
8. 7 $
7
.4
9
9. 4 $
1
0
.0
0
Solve. Explain how you got your answer.
12. Five friends want to share
10. How many quarters are there
$12.50. Daesun says that each
in $11.75?
person should get $2.50.
47; multiply 11 by 4.
Is he correct?
Then add 3 more quarters.
Explain how you decided.
11. How many nickels are there in
Yes. $12.50 5 $2.50
$3.15?
63; 315 5 63
Math
Reasoning
Money
MR 3.1
13. Amanda wants to buy 6 presents. She has $10.
Which price range should she use for each present? Explain.
A.
between $1.50 and $2
B.
between $2 and $3
C.
between $1.00 and $1.50
D. between $6.00 and $10.00
Chapter 21 – Lesson 3
C. $9 divided by 6 is $1.50.
The other choices would be
too much money.
Student Book Page
page 247
Name
P RAC T I C E
…at home!
Divide.
$1.45
1. 3 $
9
.9
9
$2.10
2. 6 $
8
.7
0
$0.62
3. 4 $
8
.4
0
$2.23
4. 7 $
4
.3
4
$1.20
5. 3 $
6
.6
9
$1.65
6. 6 $
7
.2
0
$1.07
7. 5 $
8
.2
5
$2.75
8. 7 $
7
.4
9
9. 4 $
1
1
.0
0
Solve. Explain how you got your answer.
12. Six friends want to share $15.00.
10. How many quarters are there
Rory says that each person
in $12.25?
should get $2.50.
49; multiply 12 by 4.
Is he correct?
Then add 1 more quarter.
Explain how you decided.
11. How many nickels are there in
Yes. $15.00 6 $2.50
$3.25?
65; 325 5 65
Math
Reasoning
Money
MR 3.1
13. Marjorie wants to buy 4 presents. She has $10.
Which price range should she use for each present? Explain.
A.
between $1.50 and $2
B.
between $2 and $2.50
C.
between $1.00 and $1.50
B. $10 divided by 4 is $2.50.
D. between $6.00 and $10.00
page 166
Home Resource and Homework
Chapter 21 Lesson 3
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$3.33