fact-family/add-sub-within-20/easy · セット 90
6 problems
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クラス:
日付：
1
Write the fact family for 1, 16, 17:
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2
Write the fact family for 12, 5, 17:
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3
Write the fact family for 4, 7, 11:
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4
Write the fact family for 8, 8, 16:
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5
Write the fact family for 17, 3, 20:
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6
Write the fact family for 10, 1, 11:
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