fact-family/add-sub-within-100/easy · 套题 28
6 problems
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1
Write the fact family for 41, 2, 43:
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2
Write the fact family for 67, 9, 76:
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3
Write the fact family for 72, 1, 73:
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4
Write the fact family for 12, 55, 67:
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5
Write the fact family for 9, 30, 39:
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6
Write the fact family for 78, 21, 99:
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