脱式计算，能简算的要简算．3.5÷（0.7×0.4）；9.42-（2.76-1.58）；1513-37-213-47；（110-112+115）÷160．

Question

脱式计算，能简算的要简算．
3.5÷（0.7×0.4）；   9.42-（2.76-1.58）；    (15)/(13)-(3)/(7)-(2)/(13)-(4)/(7)；    （(1)/(10)-(1)/(12)+(1)/(15)）÷(1)/(60)．

Answer 1

（1）3.5÷（0.7×0.4）
=3.5÷0.7÷0.4
=5÷0.4
=12.5；

（2）9.42-（2.76-1.58）
=9.42-2.76+1.58
=9.42+1.58-2.76
=11-2.76
=8.24；

（3）(15)/(13)-(3)/(7)-(2)/(13)-(4)/(7)
=（(15)/(13)-(2)/(13)）-（(3)/(7)+(4)/(7)）
=1-1
=0；

（4）（(1)/(10)-(1)/(12)+(1)/(15)）÷(1)/(60)
=（(1)/(10)-(1)/(12)+(1)/(15)）×60
=(1)/(10)×60-(1)/(12)×60+(1)/(15)×60
=6-5+4
=5．