9.6*1.4+3.2*5.8简便运算.

9.6*1.4+3.2*5.8
=3.2*3*1.4+3.2*5.8
=3.2*(3*1.4+5.8)
=3.2*10
=32
再问： (9.45+9.9)÷0.9 谢谢
再答： (9.45+9.9)÷0.9 =9.45÷0.9+9.9÷0.9 =10.5+11 =21.5