问题
解答题
简算,并写出简算过程. 23-
44×(
7.5×46.7+52.3×7.5+7.5 6×
[
|
答案
(1)23-
-12 17 5 17
=23-(
+12 17
),5 17
=23-1,
=22;
(2)44×(
-5 11
) 1 4
=44×
-44×5 11
,1 4
=20-11,
=9;
(3)7.5×46.7+52.3×7.5+7.5
=(46.7+52.3+1)×7.5,
=100×7.5,
=750;
(4)6×
+13÷4-19×0.251 4
=6×
+13×1 4
-19×1 4
,1 4
=(6+13-19)×
,1 4
=0×
,1 4
=0;
(5)[
-(3 5
-3 4
)]÷42 5
=[
+3 5
-2 5
]÷4,3 4
=[1-
]÷4,3 4
=
×1 4
,1 4
=
.1 16