fact-family/mixed-within-20-fill-blanks · 套题 53
6 problems
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1
Write the fact family for 4, 2, 6:
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2
Write the fact family for 11, 3, 14:
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3
Write the fact family for 4, 16, 20:
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4
Write the fact family for 3, 11, 14:
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5
Write the fact family for 6, 6, 12:
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6
Write the fact family for 18, 1, 19:
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