fact-family/mul-div-within-20-write-all · 套题 25
5 problems
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1
Write the fact family for 19, 1, 20:
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2
Write the fact family for 6, 2, 8:
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3
Write the fact family for 2, 17, 19:
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4
Write the fact family for 9, 4, 13:
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5
Write the fact family for 6, 5, 11:
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