fact-family/mixed-within-20-fill-blanks · 套题 36
6 problems
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1
Write the fact family for 11, 3, 14:
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2
Write the fact family for 11, 1, 12:
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3
Write the fact family for 8, 12, 20:
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4
Write the fact family for 7, 4, 11:
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5
Write the fact family for 18, 1, 19:
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6
Write the fact family for 16, 4, 20:
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