fact-family/add-sub-within-20/hard · 套题 99
6 problems
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1
Write the fact family for 8, 4, 32:
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2
Write the fact family for 10, 3, 13:
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3
Write the fact family for 6, 6, 12:
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4
Write the fact family for 6, 6, 36:
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5
Write the fact family for 4, 9, 36:
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6
Write the fact family for 15, 3, 18:
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