谁做得对,奖他(她)一面
.
(1)1
﹣
×
=1×
=
1
﹣
×
=1
﹣
=1
(2)72×
÷72×
=72×
×
=
72×
÷72×
=(72×
)÷(72×
)
=1
.
脱式计算(用自己喜欢的方法计算)
(1)3﹣
﹣
(2)
×
+
×
(3)
×
+
÷
(4)18×(
+
)(5)
×7+
×5(6)(
﹣
)×24﹣
.
(1)
×73+
×14×6(2)12÷
﹣
×
(3)47
÷46.
计算
(
﹣
+
)÷
÷8+
×
×12×
×16
÷(
+
)
×
+
÷
×40%+
×60%
÷[(
﹣
)÷
](
﹣
)×42.
下面各题,怎样算简便就怎样算
(1)
﹣(
+
)×
(2)(1﹣75%)÷(1+
)(3)
+
(4)(
﹣
÷2)×
(5)59÷[1÷(
﹣9%)](6)
.