Question

2.5*7.3+1.2*2.7+1.3*2.7简便方法？

Answer 1

2.5×7.3+2.7×(1.2+1.3)=2.5×(7.3+2.7)=2.5×10=25

Answer 2

原式=2.5*7.3+（1.2+1.3）*2.7
=2.5*7.3+2.5*2.7
=2.5*（7.3+2.7）
=2.5*10
=25