Question

简便运算 （做得好30分）2.5*0.32*1.25 3.6-3.6*0.8

Answer 1

2.5*0.32*1.25 =（2.5*4）*（0.08*1.25）

=10*0.1=1

3.6-3.6*0.8 =3.6*（1-0.8）=3.6*0.2=0.72