fact-family/add-sub-within-20-write-all · 套题 47
6 problems
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1
Write the fact family for 11, 2, 13:
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2
Write the fact family for 3, 9, 12:
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3
Write the fact family for 1, 9, 10:
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4
Write the fact family for 8, 8, 16:
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5
Write the fact family for 8, 3, 11:
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6
Write the fact family for 17, 3, 20:
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