来源:学生作业帮 编辑:神马作文网作业帮 分类:数学作业 时间:2024/11/13 17:15:44
能简便计算的简便计算 就4道!
(5)[(13 +25 )÷2]×511 (6)735+24×207
(7)0.234÷(0.9-0.25) (8)37.5×2.5+2.5×2.5
(5)[(13 +25 )÷2]×511
=38÷2×511
=19×511
=9709
(6)735+24×207
=735+4968
=5703
(7)0.234÷(0.9-0.25)
=0.234÷0.65
=0.36
(8)37.5×2.5+2.5×2.5
=2.5×(37.5+2.5)
=2.5×40
=25×4
=100