fact-family/add-sub-within-10/expert · 套题 11
6 problems
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1
Write the fact family for 9, 1, 10:
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2
Write the fact family for 9, 4, 36:
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3
Write the fact family for 3, 9, 27:
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4
Write the fact family for 4, 5, 9:
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5
Write the fact family for 5, 3, 15:
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6
Write the fact family for 3, 7, 21:
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