fact-family/add-sub-within-20-fill-blanks · セット 93
6 problems
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1
Write the fact family for 8, 2, 10:
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2
Write the fact family for 17, 1, 18:
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3
Write the fact family for 11, 2, 13:
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4
Write the fact family for 12, 1, 13:
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5
Write the fact family for 9, 6, 15:
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6
Write the fact family for 5, 13, 18:
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