CCSS
Apply properties
of operations
as strategiesand
to multiply
andto
NS 2.3G3.OA.5
Use the inverse
relationship
of multiplication
division
divide.2 Examples: If 6 x 4 = 24 is known, then 4 x 6 = 24 is also known. (Commutative
compute and check results.
property of multiplication.) 3 x 5 x 2 can be found by 3 x 5 = 15, then 15 x 2 = 30, or by 5
x 2 = 10, then 3 x 10 = 30. (Associative property of multiplication.) Knowing that 8 x 5 =
40 and 8 x 2 = 16, one can find 8 x 7 as 8 x (5 + 2) = (8 x 5) + (8 x 2) = 40 + 16 = 56.
(Distributive property.)
CCSS G3.OA.6
UNDERLYING SKILLS AND CONCEPTS:
multiplication basic facts
Understand division as an unknown-factor problem. For example,
Divide by 6 and 9
0
1
2
3
4
5
6
7
8
9 10
0 0
0
0
0
0
0
0
0
0
0
1 0
1
2
3
4
5
6
7
8
9 10
2 0
2
4
6
8 10 12 14 16 18 20
3 0
3
6
9 12 15 18 21 24 27 30
4 0
4
8 12 16 20 24 28 32 36 40
5 0
5 10 15 20 25 30 35 40 45 50
6 0
6 12 18 24 30 36 42 48 54 60
7 0
7 14 21 28 35 42
42 49 56 63 70
8 0
8 16 24 32 40 48 56 64 72 80
9 0
9 18 27 36 45 54 63 72 81 90
0
a
K
You can use
multiplication
ey Ide
facts to help you solve
division problems.
Find 42 6.
Think: “6 times what number
makes 42?”
6 42
6 7 42
So, 42 6 7
10 0 10 20 30 40 50 60 70 80 90 100
E x am p l E
Find 36 9 C – © CSL Associates, Inc. All rights reserved.
There are 36 children in the softball club.
There are 9 children on each team.
How many teams are there?
.
Think of the related multiplication fact.
9 36
9 4 36
So, 36 9 = 4
There are 4 teams.
page 152
Chapter 13 – Lesson 4
Name
P RAC T I C E
Find the missing number.
1. 7 5
35
35 7 4. 6 7
42
42 6 7. 8 6
5
7
48
48 8 6
7
63
63 9 5. 7 8
56
56 7 8. 8 9
7
8
72
72 8 9
10. 64 8 8
C – © CSL Associates, Inc. All rights reserved.
2. 9 11. 45 9 5
Solve.
13. There are 49 days left until Nita
visits her grandmother. How
many weeks is that?
6
54
54 9 6. 6 6
36
36 6 9. 7 6
6
6
42
42 7 6
12. 81 9 9
14. Mr. Chu used 81 eggs to make 9
cakes. How many eggs did he
use for each cake?
49 7 7 weeks
Math
Reasoning
3. 9 81 9 9 eggs
Number Sense
MR 2.3
Circle true or false. Explain your thinking.
15. 6 5 30 3
true
false
30 is not the same as 10.
16. 3 8 4 6
true
false
24 is the same as 24.
17. 36 6 36 9
true
false
6 is not the same as 4.
Chapter 13 – Lesson 4
page 153
MCX94.HW.CL.G3.FM&Lesson.v211
8/3/04
13:56
Page 104
Name
…at home!
P RAC T I C E
Find the missing number.
6
42
42 7 4. 6 6
36
36 6 7. 8 9
6
6
72
9
9
2. 9 5
45
45 9 5. 6 4
6
5
7
63
63 9 24
24 6 8. 8 3. 9 6. 6 4
8
48
48 6 48
9. 7 6
8
9
7
8
63
9
7
72 8 48 8 63 7 10. 72 8 11. 48 6 12. 63 9 Solve.
13. There are 63 days left until Nita 14. Mr. Leong used 48 eggs to make
6 cakes. How many eggs did he
visits her aunt. How many weeks
use for each cake?
is that?
63 7 9 weeks
Math
Reasoning
48 6 8 eggs
Number Sense
MR 2.3
Circle true or false. Explain your thinking.
15. 6 5 30 3
true
false
30 is not the same as 27.
16. 3 6 2 9
true
false
18 is the same as 18.
17. 32 4 64 8
true
false
8 is the same as 8.
page 104
Home Resource and Homework
Chapter 13 Lesson 4
C – © CSL Associates, Inc. All rights reserved.
1. 7 MCX94TEG3Ch01_32.v8.9.3 2/21/01 14:46 Page 283
Name
P RAC T I C E
Find the missing number.
1. 7 5
35
35 7 4. 6 7
42
42 6 7. 8 6
5
7
48
48 8 6
7
63
63 9 5. 7 8
56
56 7 8. 8 9
7
8
72
72 8 9
10. 64 8 8
C – © CSL Associates, Inc. All rights reserved.
2. 9 11. 45 9 5
Solve.
13. There are 49 days left until Nita
visits her grandmother. How
many weeks is that?
6
54
54 9 6. 6 6
36
36 6 9. 7 6
6
6
42
42 7 6
12. 81 9 9
14. Mr. Chu used 81 eggs to make 9
cakes. How many eggs did he
use for each cake?
49 7 7 weeks
Math
Reasoning
3. 9 81 9 9 eggs
Number Sense
MR 2.3
Circle true or false. Explain your thinking.
15. 6 5 30 3
true
false
30 is not the same as 10.
16. 3 8 4 6
true
false
24 is the same as 24.
17. 36 6 36 9
true
false
6 is not the same as 4.
Chapter 13 – Lesson 4
Student Book Page
page 153
Name
…at home!
P RAC T I C E
Find the missing number.
6
42
42 7 4. 6 6
36
36 6 7. 8 9
6
6
72
9
9
2. 9 5
45
45 9 5. 6 4
6
5
7
63
63 9 24
24 6 8. 8 3. 9 6. 6 4
8
48
48 6 48
9. 7 6
8
9
7
8
63
9
7
72 8 48 8 63 7 10. 72 8 11. 48 6 12. 63 9 Solve.
13. There are 63 days left until Nita 14. Mr. Leong used 48 eggs to make
6 cakes. How many eggs did he
visits her aunt. How many weeks
use for each cake?
is that?
63 7 9 weeks
Math
Reasoning
48 6 8 eggs
Number Sense
MR 2.3
Circle true or false. Explain your thinking.
15. 6 5 30 3
true
false
30 is not the same as 27.
16. 3 6 2 9
true
false
18 is the same as 18.
17. 32 4 64 8
true
false
8 is the same as 8.
page 104
Home Resource and Homework
Chapter 13 Lesson 4
C – © CSL Associates, Inc. All rights reserved.
1. 7