fact-family/add-sub-within-10/hard · セット 21
6 problems
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日付：
1
Write the fact family for 7, 1, 8:
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2
Write the fact family for 7, 2, 9:
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3
Write the fact family for 2, 4, 8:
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4
Write the fact family for 8, 3, 24:
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5
Write the fact family for 2, 5, 7:
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6
Write the fact family for 7, 6, 42:
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