Question

3.75*6.5+37.5*0.37-0.37*0.2简便计算,请问这道题怎么做？

Answer 1

3.75×6.5+37.5×0.37-0.37×0.2
=3.75×6.5+3.75×37-0.37×0.2
=3.75×(6.5+3.7)-0.37×0.2
=3.75×10.2-0.37×0.2
=3.75×(10+0.2)-0.37×0.2
=3.75×10+3.75×0.2-0.37×0.2
=37.5+(3.75-0.37)×0.2
=37.5+3.38×0.2
=37.5+0.676
=38.176

Answer 2

=3.75（6.5+10*0.37）-0.37*0.2
=3.75*10.2-0.74
=38.25-0.74
=37.51

Answer 3

=3.75*6.5+3.75*(3.5+0.2)-3.7*0.02

=3.75*(6.5+3.5)+3.75*0.2-3.7*0.02
=37.5+0.75-0.074
=38.176
后面这个 -0.37*0.2是题目错了吧，感觉完全用不上啊

Answer 4

=(3.7+0.05)*6.5+37.3*0.37
=(3.7+0.05)*6.5+3.73*3.7
=3.7*(6.5+3.73)+6.5*0.05
=3.7*10.23+0.325
=38.176