121×100又1/121简便计算 - 知识问答

121×100又1/121简便计算

3个回答

121 X (100+ 1/121)
= 121 X 100 + 121 X 1/121
= 12100 + 121/121
= 12100 + 1
= 12101
9999 + 999 + 99 + 9
= 10000 -1 + 1000 -1 + 100 -1 + 9
= 11100 + 6
= 11106

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