www.5129.net > 65.4*0.67+6.54*3.1+0.654*2怎么简算

65.4*0.67+6.54*3.1+0.654*2怎么简算

65.4*0.67+6.54*3.1+0.654*2 =6.54*(6.7+3.1+0.2) =

=6.54*6.7+6.54*3.1+6.54*0.2 =6.54*(6.7+3.1+0.2) =6

65.4x0.67+6.54x3.1+0.654x2 =0.654x67+0.654x31+0.6

巧算下面这道题: 65.4x0.67+6.54x3.1+0.654x2 =6.54x6.7+6.54

观察特点,都有654.可以提出来,再算,后面小数点就先处理在算加减,最后算654

0.654×10.9+6.54×(20-1.09) =6.54×1.09+6.54×18.91

25.25*0.65*4/0.65 =(25.25 * 4 )*(0.65÷0.65) =101

原式 =6.54(49-10×38+0.1×90) =6.54(49-380+9) = -2

0.65X6.4一0.65X2.4 =0.65x(6.4+2.4) =0.65x8.8 =5.

65.4×0.67+6.54×3.1 =65.4×0.67+65.4×0.31 =65.4×(0

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