fact-family/add-sub-within-20/hard · セット 86
6 problems
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1
Write the fact family for 11, 4, 44:
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2
Write the fact family for 5, 7, 35:
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3
Write the fact family for 9, 12, 108:
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4
Write the fact family for 8, 9, 72:
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5
Write the fact family for 12, 10, 120:
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6
Write the fact family for 14, 1, 15:
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