Subtract to 20
(1) Subtract the numbers
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(2) Subtract the numbers and check using addition
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(3) Calculate
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10 + 5 = __
15 - 5 = __ |
10 + 9 = __
19 - 9 = __ |
10 + 3 = __
13 - 3 = __ |
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10 + 6 = __
16 - 6 = __ |
10 + 8 = __
18 - 8 = __ |
10 + 4 = __
14 - 4 = __ |