fact-family/add-sub-within-20/hard · 套题 59
6 problems
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1
Write the fact family for 5, 4, 9:
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2
Write the fact family for 10, 5, 50:
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3
Write the fact family for 5, 4, 20:
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4
Write the fact family for 3, 7, 21:
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5
Write the fact family for 7, 3, 10:
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6
Write the fact family for 16, 3, 19:
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