1. Addition and Subtraction
Fact Families
© 2007 M. Tallman

2. Addend- a number that is added to another.3 + 4
= 7
addend
addend
© 2007 M. Tallman

3. Sum- the answer to an addition problem.3 +
4 = 7
addend
addend
sum
© 2007 M. Tallman

4. Sum- the answer to an addition problem.7
sum

5. Addend- a number that is added to another.7
sum 3 4
addend
addend
© 2007 M. Tallman

6. Addition and Subtraction Fact Families
6 + 2 = 8
2 + 6 = 8
8 – 2 = 6
8 – 6 = 2
© 2007 M. Tallman

7. Addition and Subtraction Fact Families
3 + 6 = 9
6 + 3 = 9
9 – 6 = 3
9 – 3 = 6
© 2007 M. Tallman

8. Addition and Subtraction Fact Families
5 + 2 = 7
2 + 5 = 7
7 – 2 = 5
7 – 5 = 2
© 2007 M. Tallman

9. Addition and Subtraction Fact Families
9 + 2 = 11
2 + 9 = 11
11 – 2 = 9
11 – 9 = 2
© 2007 M. Tallman

10. 7 + 8 = k k = 15 h + 7 = 15 h = 8 15 – 7 = h h = 8 15 - 8 = s s = 7
Your Turn!
Use what you know about fact families to solve for the unknown variable.
7 + 8 = k
k = 15
h + 7 = 15
h = 8
15 – 7 = h
h = 8
= s
s = 7
© 2007 M. Tallman

11. 9 + 3 = y y = 12 x + 9 = 12 x = 3 12 – x = 9 x = 3 12 - 3 = v v = 9
Your Turn!
Use what you know about fact families to solve for the unknown variable.
9 + 3 = y
y = 12
x + 9 = 12
x = 3
12 – x = 9
x = 3
= v
v = 9
© 2007 M. Tallman

12. 8 + 9 = a a = 17 9 + b = 17 b = 8 17 – 8 = c c = 9 a - 9 = 8 a = 17
Your Turn!
Use what you know about fact families to solve for the unknown variable.
8 + 9 = a
a = 17
9 + b = 17
b = 8
17 – 8 = c
c = 9
a - 9 = 8
a = 17
© 2007 M. Tallman

13. Find the sum or difference, then write the related number sentences.
Your Turn!
Find the sum or difference, then write the related number sentences.
5 + 7 = 12
7 + 5 = 12
12 – 7 = 5
= 7
© 2007 M. Tallman

14. Find the sum or difference, then write the related number sentences.
Your Turn!
Find the sum or difference, then write the related number sentences. = 17
= 7
= 24
= 24
© 2007 M. Tallman

15. Find the sum or difference, then write the related number sentences.
Your Turn!
Find the sum or difference, then write the related number sentences. = 11
= 25
= 36
= 36
© 2007 M. Tallman

16. Find the sum or difference, then write the related number sentences.
Your Turn!
Find the sum or difference, then write the related number sentences.
9 + 9 = 18
18 – 9 = 9
© 2007 M. Tallman

17. Write the fact family for the set of numbers.
Your Turn!
Write the fact family for the set of numbers.
4, 5, 9
4 + 5 = 9
5 + 4 = 9
9 - 4 = 5
9 - 5 = 4
© 2007 M. Tallman

18. Write the fact family for the set of numbers.
Your Turn!
Write the fact family for the set of numbers.
12, 24, 36
= 36
= 36
= 24
= 12
© 2007 M. Tallman

19. Write the fact family for the set of numbers.
Your Turn!
Write the fact family for the set of numbers.
26, 17, 43
= 43
= 43
= 26
= 17
© 2007 M. Tallman

20. Write the fact family for the set of numbers.
Your Turn!
Write the fact family for the set of numbers.
16, 8, 8
= 8
8 + 8 = 16
© 2007 M. Tallman