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Addition and Subtraction to 20
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What doubles fact helps you to solve 7 + 8?
7 + 7 or 8 + 8
What doubles fact helps you to solve 5 + 6?
5 + 5 or 6 + 6
What addition sentence is related to 17 - 9?
9 + 8 = 17 or 8 + 9 = 17
What subtraction sentence is related to 5 + 8 = 13?
13 - 8 = 5 or 13 - 5 = 8
A family of 6 dolphins swam past my boat. Then 7 more dolphins swam by. How many dolphins did I get to see?
13 dolphins
It’s time for lunch! 19 children go through the lunch line. 13 of them get chocolate milk. The rest get white milk. How many kids get white milk?
6 children
It snowed 8 days last month and 6 days this month. How many more days did it snow last month than this month?
2 more days
Katie counts the seeds in her watermelon. She counts 6 brown seeds and 12 black seeds. How many seeds were in Katie’s watermelon?
18 watermelon seeds
? + 8 = 12
4
20 - 10?
10
9 - ? = 3
6
7 + ? = 12
5
9 + 9?
18
18 - 6?
12
7 + 9?
16