fact-family/mixed-within-20-fill-blanks · セット 68
6 problems
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1
Write the fact family for 3, 17, 20:
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2
Write the fact family for 11, 6, 17:
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3
Write the fact family for 1, 8, 9:
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4
Write the fact family for 8, 2, 10:
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5
Write the fact family for 19, 1, 20:
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6
Write the fact family for 12, 3, 15:
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