fact-family/mixed-within-20-write-all · 套题 44
6 problems
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1
Write the fact family for 2, 17, 19:
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2
Write the fact family for 14, 1, 15:
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3
Write the fact family for 6, 1, 7:
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4
Write the fact family for 1, 6, 7:
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5
Write the fact family for 7, 6, 13:
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6
Write the fact family for 11, 1, 12:
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