fact-family/mixed-within-20-fill-blanks · セット 25
6 problems
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1
Write the fact family for 5, 15, 20:
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2
Write the fact family for 1, 7, 8:
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3
Write the fact family for 2, 15, 17:
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4
Write the fact family for 7, 3, 10:
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5
Write the fact family for 1, 17, 18:
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6
Write the fact family for 3, 10, 13:
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