Pairs of Related Facts
Solve. Then decide of the pairs are related facts.
6 + 5 = ______
11 - 5 = ______
Yes or No?
6 + 5 = 11
11 - 5 = 6
Yes
5 + 9 = _____
9 + ____ = 14
14 - 9 = _____
____ - ____ = _____
5 + 9 = 14
9 + 5 = 14
14 - 9 = 5
14 - 5 = 9
What is 12 - 4?
____ + ____ = ____
So, 12 - 4 = ____
4 + 8 = 12
So, 12 - 4 = 8
Solve 7 + ___ =16.
____ - ____ = _____
7 + _____ = 16
16 - 7 = 9
7 + 9 = 16
Solve. Then decide of the pairs are related facts.
3 + 8 = ______
8 - 3 = ______
Yes or No?
3 + 8 = 11
8 - 3 = 5
No
Teresa has 8 yellow flowers. The rest of her flowers are red. She has 14 flowers altogether. How many red flowers does she have?
8 + ___ = 14
___ - ___ = ____
____ red flowers
8 + 6 = 14
14 - 8 = 6
6 red flowers
What is 16 - 9?
____ + ____ = ____
So, 16 - 9 = ____
9 + 7 = 16
So, 16 - 9 = 7
What is the difference?
8
- 3
---------
5
Solve. Then decide of the pairs are related facts.
5 + 7 = ______
7 - 5 = ______
Yes or No?
5 + 7 = 12
7 - 5 = 2
No
Which addition equation can be used to check the answer to 15 - 7 = ____
A: 7 + 1 = 8
B: 6 + 9 = 15
C: 7 + 8 = 15
C: 7 + 8 = 15
Solve. Then decide of the pairs are related facts.
9 + 6 = ______
15 - 9 = ______
Yes or No?
9 + 6 = 15
15 - 9 = 6
Yes