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NS 3.3*2$
Know the )OXHQWO\PXOWLSO\DQGGLYLGHZLWKLQXVLQJVWUDWHJLHVVXFKDVWKH
multiplication tables of 2s, 5s and 10s (to “times 10") and
UHODWLRQVKLSEHWZHHQPXOWLSOLFDWLRQDQGGLYLVLRQHJNQRZLQJWKDW[ RQHNQRZV
commit them to memory.
· RUSURSHUWLHVRIRSHUDWLRQV%\WKHHQGRI*UDGHNQRZIURPPHPRU\DOO
SURGXFWVRIWZRRQHGLJLWQXPEHUV
UNDERLYING SKILLS AND CONCEPTS:
count by fives;
multiplication concepts
Multiply by 10
a
K
ey Ide
The numbers you multiply are factors.
The answer in multiplication is the product.
10 ! 3 " 30
factor ! factor " product
B – © CSL Associates, Inc. All rights reserved.
E x am p l E
1
Find 10 ! 4.
You can use skip counting to help you multiply.
To multiply 10 x 4, skip count by 10s four times.
__ 10 , __20 , __30 , __40
When you multiply by 10, the product looks like the
other factor with a zero on the end.
10 ! 1 " 10
10 ! 2 " 20
10 ! 3 " 30
E x am p l E
2
Multiplying by 10 is like adding tens.
10 !
3
" 30
Chapter 16 – Lesson 4
page 189
Name
P RAC T I C E
Use skip counting to multiply by 10.
1
2
10 4
10 5
10 ____
20 ____
30 40
____
____
10 ____
20 ____
30 ____
40 ____
50
____
Find the product.
5
10
4
50
7
7
10
5
3
10
70
8
10
8
80
30
2
10
9
20
■
■
6
60
10
10
10
100
■
■
6
10
4
10
40
■
■
11
10 10 100
12
10 6 60
13
10 4 40
14
10 7 70
15
10 9 90
16
10 8 80
Math
Reasoning
17
Multiply by 10
MR 2.0
Explain how to multiply 10 6.
Skip count by 10s six times.
page 190
Chapter 16 – Lesson 4
B – © CSL Associates, Inc. All rights reserved.
3
Name
P RAC T I C E
Use skip counting to multiply by 10.
1
2
10 3
10 4
10 ____
20 ____
30
____
10 ____
20 ____
30 ____
40
____
Find the product.
7
10
4
70
7
4
10
5
2
10
40
6
10
8
60
20
5
10
9
10
30
■
■
8
10
80
10
3
50
■
■
6
10
10
100
■
■
11
10 8 80
12
10 10 100
13
10 6 60
14
10 5 50
15
10 8 80
16
10 9 90
Math
Reasoning
17
Multiply by 10
MR 2.0
Explain how to multiply 10 5.
Skip count by 10 five times.
page 128
Home Resource and Homework
Chapter 16 Lesson 4
B – © CSL Associates, Inc. All rights reserved.
3
MCX94TEG2Ch01_30.v9.4.1 2/19/01 19:50 Page 349
Name
P RAC T I C E
Use skip counting to multiply by 10.
1
2
10 4
10 5
10 ____
20 ____
30 40
____
____
10 ____
20 ____
30 ____
40 ____
50
____
Find the product.
3
5
10
4
50
7
5
3
10
70
8
10
8
80
B – © CSL Associates, Inc. All rights reserved.
7
10
30
2
10
9
20
■
■
6
60
10
10
10
100
■
■
6
10
4
10
40
■
■
11
10 10 100
12
10 6 60
13
10 4 40
14
10 7 70
15
10 9 90
16
10 8 80
Math
Reasoning
17
Multiply by 10
MR 2.0
Explain how to multiply 10 6.
Skip count by 10s six times.
Chapter 16 – Lesson 4
Student Book Page
page 190
Name
P RAC T I C E
Use skip counting to multiply by 10.
1
2
10 3
10 4
10 ____
20 ____
30
____
10 ____
20 ____
30 ____
40
____
Find the product.
7
10
4
70
7
4
10
5
2
10
40
6
10
8
60
20
5
10
9
10
30
■
■
8
10
80
10
3
50
■
■
6
10
10
100
■
■
11
10 8 80
12
10 10 100
13
10 6 60
14
10 5 50
15
10 8 80
16
10 9 90
Math
Reasoning
17
Multiply by 10
MR 2.0
Explain how to multiply 10 5.
Skip count by 10 five times.
page 128
Home Resource and Homework
Chapter 16 Lesson 4
B – © CSL Associates, Inc. All rights reserved.
3