fact-family/mixed-within-20-fill-blanks · セット 12
6 problems
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1
Write the fact family for 8, 7, 15:
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2
Write the fact family for 15, 3, 18:
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3
Write the fact family for 13, 2, 15:
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4
Write the fact family for 13, 7, 20:
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5
Write the fact family for 14, 1, 15:
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6
Write the fact family for 9, 3, 12:
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