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:2024/11/11 06:51:48
简便计算
(1)9.34-(2.34+0.49)
(2)
(1)9.34-(2.34+0.49)
=9.34-2.34-0.49,
=7-0.49,
=6.51;
(2)
7
9÷
11
5+
5
11×
2
9
=
7
9×
5
11+
5
11×
2
9,
=(
7
9+
2
9)×
5
11,
=1×
5
11,
=
5
11;
(3)12.5×0.32×25
=12.5×0.8×0.4×25,
=(12.5×0.8)×(0.4×25),
=10×10,
=100.