fact-family/add-sub-within-20/easy · セット 95
6 problems
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1
Write the fact family for 7, 9, 16:
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2
Write the fact family for 10, 6, 16:
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3
Write the fact family for 4, 2, 6:
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4
Write the fact family for 11, 2, 13:
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5
Write the fact family for 2, 14, 16:
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6
Write the fact family for 14, 4, 18:
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