1. Fact Families

2. Objective
Today we will learn to write multiplication
and division fact families.

3. Let’s Review
Definitions
Addend - Any number being added.
= 11
Inverse Operation - An opposite operation that undoes another.
5 + 4 = = 4

4. Addition/Subtraction Fact Families are found by:
Starting with a simple addition fact. ( = 7)
Changing the addends around.
(5 + 2 = 7)
Writing the Inverse operations for both.
(7 - 2 = 5 & = 2)

5. What are the 4 members of the Fact Family of 3 + 4 = 7?
4 + 3 = 7
7 - 3 = 4
7 - 4 = 3

6. What are the 4 members of the Fact Family of 8 + 1 = 9?
1 + 8 = 9
9 - 8 = 1
9 - 1 = 8

7. Multiplication
Definitions
Factors - The numbers being multiplied.
4 x 8 = 32
Inverse Operation - An opposite operation that undoes another.
4 x 8 = / 4 = 8

8. Multiplication/Division Fact Families are found by:
Starting with a simple multiplication fact. ( 3 x 9 = 27)
Changing the Factors around.
(9 x 3 = 27)
Writing the Inverse operations for both.
(27 / 3 = 9 & 27 / 9 = 3)

9. What are the 4 members of the Fact Family of 3 x 7 = 21?
model
3 x 7 = 21
7 x 3 = 21
21 / 3 = 7
21 / 7 = 3

10. What are the 4 members of the Fact Family of 6 x 4 = 24?
24 / 6 = 4
24 / 4 = 6

11. Multiplication/Division Fact Families are found by:
Starting with a simple multiplication fact. ( 3 x 9 = 27)
Changing the Factors around.
(9 x 3 = 27)
Writing the Inverse operations for both.
(27 / 3 = 9 & 27 / 9 = 3)

12. What are the 4 members of the Fact Family of 7 x 8 = 56?
Guided
7 x 8 = 56
8 x 7 = 56
56 / 7 = 8
56 / 8 = 7

13. What are the 4 members of the Fact Family of 9 x 7 = 63?
63 / 9 = 7
63 / 7 = 9

14. What are the 4 members of the Fact Family of 6 x 7 = 42?
42 /6 = 7
42 / 7 = 6

15. Multiplication/Division Fact Families are found by:
Starting with a simple multiplication fact. ( 3 x 9 = 27)
Changing the Factors around.
(9 x 3 = 27)
Writing the Inverse operations for both.
(27 / 3 = 9 & 27 / 9 = 3)
CFU

16. Closure
A fact family will have two multiplication problems and two division problems.
Inverse Operation - An opposite operation that undoes another.
3x4=12 *** 12/ 4 = 3

17. Independent Practice
Write a multiplication and division fact family for the following:
1) 5 x6 = ) 9x8 = 72
2) 8x3 = ) 4x8 = 32
3) 7x2 = ) 3x9 = 27
4) 6x8 = ) 9x 2 =18
5) 2x4 = ) 4x 6 = 24

18. Answers
1) 5 x6 = x5=30 30/6=5 30/5=6
2) 8x3=24 3x8= /8=3 24/3=8
3) 7x2=24 2x7= /2= /7=2
4) 6x8= x6= /6=8 48/8=6
5) 2x4= x2= /4= /2=4

19. 6) 9x8=72 8x9= /9=8 72/8=0
7) 4x8=32 8x4= /8=4 32/4=8
8) 3x9=27 9x3= /9=3 27/3=9
9) 9x2=18 2x9= /9=2 18/2=9
10) 4x6=24 6x4=24 24/6=4 24/4=6