问题
解答题
计算各题,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,
=15+4,
=19;
(2)
×7+5 9
×11,5 9
=
×(7+11),5 9
=
×18,5 9
=10;
(3)23-
×8 9
÷3 4
,1 27
=23-
÷2 3
,1 27
=23-18,
=5;
(4)[1-(
+1 4
)]÷3 8
,1 4
=[1-
]÷5 8
,1 4
=
÷3 8
,1 4
=
.3 2