fact-family/add-sub-within-100/hard · 套题 99
6 problems
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1
Write the fact family for 17, 32, 49:
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2
Write the fact family for 21, 76, 97:
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3
Write the fact family for 53, 24, 77:
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4
Write the fact family for 57, 24, 81:
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5
Write the fact family for 4, 3, 12:
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6
Write the fact family for 83, 6, 89:
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