fact-family/add-sub-within-20/hard · 套题 23
6 problems
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1
Write the fact family for 10, 4, 40:
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2
Write the fact family for 7, 10, 17:
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3
Write the fact family for 4, 7, 28:
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4
Write the fact family for 12, 7, 19:
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5
Write the fact family for 9, 3, 12:
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6
Write the fact family for 7, 7, 14:
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