早教吧 育儿知识 作业答案 考试题库 百科 知识分享

简便计算0.25×(0.18+0.18+0.18+0.18)8.92×104-89.2×0.4.

题目详情
简便计算
0.25×(0.18+0.18+0.18+0.18)
8.92×104-89.2×0.4.
▼优质解答
答案和解析
(1)0.25×(0.18+0.18+0.18+0.18)
=0.25×(0.18×4)
=(0.25×4)×0.18
=1×0.18
=0.18;

(2)8.92×104-89.2×0.4
=8.92×104-8.92×4
=8.92×(104-4)
=8.92×100
=892.