fact-family/add-sub-within-20/medium · セット 36
6 problems
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1
Write the fact family for 2, 9, 18:
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2
Write the fact family for 5, 10, 15:
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3
Write the fact family for 3, 9, 27:
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4
Write the fact family for 8, 6, 48:
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5
Write the fact family for 8, 10, 80:
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6
Write the fact family for 13, 5, 18:
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