(7.7+1.54)\0.7用简便运算怎样做?
问题描述:
(7.7+1.54)\0.7用简便运算怎样做?
答
﹙7.7+1.54﹚÷0.7
=7.7÷0.7+1.54÷0.7
=11+2.2
=13.2