怎么简便,要递等式

问题描述:

怎么简便,要递等式
(1)5.29+0.17×0.5 (2)3.84-0.84×3(3)0.25×4.4

(1)5.29+0.17×0.5 =5.29+0.085=5.375(2)3.84-0.84×3=3.84-0.84-0.84×2=3-1.68=1.32(3)0.25×4.4=0.25×(4+0.4)=0.25×4+0.25×0.4=1+0.1=1.1