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)
.