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用简便方法计算26.8.43.7.57

这道题很简单啊把括号打开变成7.43+2.57-3.48=10-3.48=6.52 所以答案是6.

57x57+43x57 =57x(57+43) =57x100 =5700

简便方法计算 43.57×132.7-4.357×3.27 =43.57×132.7-43.57

7.43÷0.125+2.57×8 =7.43×8+2.57×8 =(7.43+2.57)×8

7.43-(3.48-2.57) =7.43-3.48+2.57 =(7.43+2.57)-3.

解:21.43-2.67+7.57-8.53=21.43+7.57-(2.67+8.53)=29-1

(1)2.8*1.43=4.004 5.7*0.28=1.596 4.004+1.5

原式=1/2(43又7/8+57又1/8)-0.5 =49.5(0.125=1/8)

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