fact-family/mixed-within-20-fill-blanks · セット 99
6 problems
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1
Write the fact family for 10, 10, 20:
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2
Write the fact family for 8, 7, 15:
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3
Write the fact family for 14, 1, 15:
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4
Write the fact family for 6, 5, 11:
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5
Write the fact family for 3, 1, 4:
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6
Write the fact family for 12, 5, 17:
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