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230问答网 > 7.8x5.6+2.3x4.4的简便算法

7.8x5.6+2.3x4.4的简便算法

2025-01-02 10:13:06

推荐回答（3个）

回答1：

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

回答2：

7.8×5.6+2.3×4.4.
=（5.6+4.4）×（7.8+2.2）+（5.6+4.4）×0.1
=100+1
=101

回答3：

7.8x5.6+2.3x4.4
=7.8x（10-4.4）+2.3x4.4
=7.8*10-7.8*4.4+2.3*4.4
=78-4.4*（7.8-2.3）
=78-4.4*5.5
=78-4*1.1*5*1.1
=78-20*1.21
=78-24.2
=53.8

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