fact-family/add-sub-within-20/hard · セット 44
6 problems
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1
Write the fact family for 9, 2, 18:
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2
Write the fact family for 4, 3, 7:
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3
Write the fact family for 8, 10, 18:
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4
Write the fact family for 10, 11, 110:
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5
Write the fact family for 6, 6, 12:
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6
Write the fact family for 3, 10, 30:
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