6.25乘七点86点二五×2点一
6.25乘七点8 6点二五×2点一 -
6.25乘七点8 +6点二五×2点1 =6.25×(7.8+2.1)=6.25×(10-0.1)=62.5-0.625 =61.875。
2.5×35.86×0.4 ＝2.5×0.4×35.86 ＝1×35.86 ＝35.86 供参考，
6.25乘七点8 +6点二五×2点1 =6.25×(7.8+2.1)=6.25×(10-0.1)=62.5-0.625 =61.875。
2.5×35.86×0.4 ＝2.5×0.4×35.86 ＝1×35.86 ＝35.86 供参考，
45.8x0.25x1.25x32 解：简便计算=45.8x0.25x1.25x（4x8）45.8x（0.25x4）x（1.25x8）45.8x1x10 =458 祝学习进步。
=8.2*(2.14 6.86 1)=8.2*10 =82
86点2乘10点1减去86点2简便怎么算 -
86.2x10.1一86.2 =（86.2x86.2）一10.1 =？
86.9×10.1=86.9×(10+0.1)=86.9×10+86.9×0.1=869+8.69=877.69
2.5×35点86×0点四用简便方法计算过程 -
2.5×35.86×0.4 =2.5×0.4×35.86 =1×35.86 =35.86
回答：86.7*10.1=86.7*10+86.7*0.1 =867+8.67 =875.67
86点9×1点七三-8点六九×7点三的简便运算 -
86点9×1点七三-8点六九×7点三的简便运算=86.9×（1.73-0.73）86.9×1 =86.9
2.4×57+1.2×86 =2.4×57+2.4×43 =2.4×(57+43)=2.4×100 =240。