问题
解答题
下面各题,怎样算简便就怎样算
|
答案
(1)
-(15 16
+7 12
)×1 6
,1 2
=
-15 16
×3 4
,1 2
=
-15 16
,3 8
=
;9 16
(2)(1-75%)÷(1+
),1 4
=
÷1 4
,5 4
=
;1 5
(3)
×5 17
+9 24
×7 17
,9 24
=(
+5 17
)×7 17
,9 24
=
×12 17
,9 24
;9 34
(4)(
-2 5
÷2)×2 5
,5 3
=(
-2 5
)×1 5
,5 3
=
×1 5
,5 3
=
;1 3
(5)59÷[1÷(
-9%)],1 10
=59÷[1÷0.01],
=59÷100,
=0.59;
(6))
×79+21×0.2,1 5
=(79+21)×0.2,
=100×0.2,
=20.