7.8x5.6+3.9x8.8最简便方法怎么算?

78471342022-10-04 11:39:541条回答

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najinxi 共回答了20个问题 | 采纳率100%: 7.8x5.6+3.9x8.8
=7.8x5.6+3.9x2x4.4
=7.8x（5.6+4.4)
=7.8x10
=78; 1年前

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7.8x5.6+2.3x4.4的简便算法 三轮卡1年前1: 真言不讳共回答了18个问题 | 采纳率100%

7.8x5.6+2.3x4.4
=（5.5+2.3）x5.6+2.3x4.4
=5.5x5.6+2.3x5.6+2.3x4.4
=5.5x5.6+2.3x（5.6+4.4）
=5x5.6+0.5x5.6+23
=28+2.8+23
=53.8

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