Question

怎样简便就怎么样算

9.07-22.78÷17

1.05÷0.7+18.9

21.5÷0.05x0.96

Answer 1

9.07-22.78÷17=9.07-1.34=9.07-2+0.66=7.07+0.66=7.731.05÷0.7+18.9=0.15+18.9=18.9+0.1+0.05=19.0521.5÷0.05x0.96=430x0.96=430x（1-0.04）=430-430x0.04=430-17.2=412.8

Answer 2

计算器算最简便：
9.07-1.34=7.73
1.5+18.9=20.4
430*0.96=412.8

追问

简便计算你不懂啊

追答

（1）9.07-(17+5.1+0.68)÷17=9.07-(1+0.3+0.04)=9.07-1.34=7.73（2）1.5×0.7÷0.7+18.9=20.4（3）2150÷5×(1-0.04)=430-430*0.04=412.8