题目

用简便方法计算：100.01*2.7= 0.42*160+36*1.6-34*3.2= 32*0.25*12.5*0.2*5= 11*22+0.22*3300+330*4.4=
0.5*0.8*0.04*1.25*0.2*0.025= 0.92*54+0.46*92=

提问时间：2020-07-27

答案

100.01*2.7
=100*2.7+0.01*2.7
=270+0.027
=270.027
0.42*160+36*1.6-34*3.2
= 42*1.6+36*1.6-68*1.6
=（42+36-68）*1.6
=10*1.6
=16
32*0.25*12.5*0.2*5
= 4*0.25*8*12.5*0.2*5
=1*100*1
=100
11*22+0.22*3300+330*4.4
=11*22+22*33+66*22
=22*（11+33+66）
=22*110
=2420
0.5*0.8*0.04*1.25*0.2*0.025
=0.5*0.2*0.8*1.25*0.04*0.025
=0.1*1*0.001
=0.0001
0.92*54+0.46*92
=0.92*54+46*0.92
=0.92*（54+46）
=0.92*100
=92