问题
解答题
计算下面各题,能简便运算的写出主要过程.
|
答案
(1)36×(
+1 4
+1 6
),1 9
=36×
+36×1 4
+36×1 6
,1 9
=9+6+4,
=19;
(2)(
+1 3
-1 4
)×24,1 24
=
×24+1 3
×24-1 4
×24,1 24
=8+6-1,
=13;
(3)
×3 5
+2 3
÷12 5
,1 2
=
×3 5
+2 3
×2 5
,2 3
=(
+3 5
)×2 5
,2 3
=1×
,2 3
=
;2 3
(4)[1-(
+1 4
)]÷3 8
,1 4
=[1-
]÷5 8
,1 4
=
÷3 8
,1 4
=
.3 2