fact-family/add-sub-within-20/easy · セット 94
6 problems
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1
Write the fact family for 11, 9, 20:
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2
Write the fact family for 2, 12, 14:
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3
Write the fact family for 15, 5, 20:
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4
Write the fact family for 12, 5, 17:
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5
Write the fact family for 5, 10, 15:
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6
Write the fact family for 15, 2, 17:
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