fact-family/add-sub-within-20/easy · セット 69
6 problems
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クラス:
日付：
1
Write the fact family for 1, 17, 18:
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2
Write the fact family for 4, 8, 12:
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3
Write the fact family for 6, 4, 10:
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4
Write the fact family for 18, 1, 19:
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5
Write the fact family for 5, 6, 11:
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6
Write the fact family for 14, 6, 20:
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