99.9x7.78+33.3x6.66的巧算

wujieyaohuo2022-10-04 11:39:541条回答

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风之妖共回答了21个问题 | 采纳率95.2%: 99.9x7.78+33.3x6.66
=99.9x7.78+33.3x3x2.22
=99.9x7.78+99.9x2.22
=99.9x(7.78+2.22)
=99.9x10
=999; 1年前

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