fact-family/add-sub-within-20-fill-blanks · セット 65
6 problems
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1
Write the fact family for 10, 2, 12:
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2
Write the fact family for 11, 9, 20:
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3
Write the fact family for 9, 8, 17:
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4
Write the fact family for 8, 10, 18:
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5
Write the fact family for 7, 4, 11:
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6
Write the fact family for 11, 6, 17:
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