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7.8x5.6+2.3x4.4要简便算法,怎么算

7.8x5.6+2.3x4.4=4x(7.8x1.6+2.3x1.1)=4x(12.48x2.53)=4x15.01=60.04 先乘除后加减 直接运算也是可以的

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

7.8x5.6+7.8x4.4=7.8*(5.6+4.4)=7.8*10=78运用乘法分配律

7.8x5.6+ 2.2x4.4=43.68+9.68=53.36没有简算,直接计算千万别和乘法分配律混淆

78-7.8x4.4+2.3x4.4=78-(7.8-2.3)x4.4=78-5.5x4.4=78-24.2=53.8

7.8x5.6+3.9x8.8=7.8x5.6+3.9x2x4.4=7.8x(5.6+4.4)=7.8x10=78

7.8x4.6+2.3x94.4=15.6*2.3+2.3*94.4=(15.6+94.4)*2.3=110*2.3=253

=(7.8*5.6)+(2.3*4.4)=43.68+10.12=53.8

7.8x5.6+2.3x4.4=7.8x(10-4.4)+2.3x4.4=78-7.8x4.4+2.3x4.4=78-4.4x5.5=53.8

7.8x2+2.2x4=20.2+8.8=29

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