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Subtraction Within 20
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  • If the delimiter is used in a question, the question should be surrounded by double quotes: "My, question","My, answer"
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May has 20 balloons. She sells 7 of them. How many balloons are left?
20 - 7 = 13
Peter buys 18 ice creams. But 7 of them are melting. How many ice creams are left?
18 - 7 = 11
16 - 9 =
7
There are 17 ice creams, but 7 ice creams are melting. How many ice cream are there now?
17 - 7 = 10
Minh has 15 bars of chocolate. He gives 6 bars to his friends. How many bars of chocolate are left?
15 - 6 = 9
12 - 9 =
3
11 - 9 =
2
14 - 9 = _
5
14 - 8 = _
6
13 - 7 = _
6
13 - 8 = _
5
15 - 3 = _
12
17 - 9 =
8
17 - 7 = _
10
18 - 9 =
9
18 - 7 =
11
16 - 8 =
4
20 - 5 = _
15