fact-family/mul-div-6-9/expert · 套题 52
5 problems
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1
Write the fact family for 8, 1, 9:
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2
Write the fact family for 3, 4, 7:
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3
Write the fact family for 9, 8, 72:
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4
Write the fact family for 1, 2, 3:
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5
Write the fact family for 3, 3, 9:
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