怎样简便就怎样算.36×(12+13+14)57×[0.75-(12+0.25)]1.25+(56-14)×12-数学

题文

怎样简便就怎样算.
36×(
1
2
+
1
3
+
1
4
5
7
×[0.75-(
1
2
+0.25)]
1.25+(
5
6
-
1
4
)×12
题型:解答题  难度:中档

答案

(1)36×(
1
2
+
1
3
+
1
4
),
=36×
1
2
+36×
1
3
+36×
1
4

=18+12+9,
=39;
(2)
5
7
×[0.75-(
1
2
+0.25)],
=
5
7
×[0.75-
1
2
-0.25],
=
5
7
×[0.75-0.25-
1
2
],
=
5
7
×[0.5-0.5],
=
5
7
×0,
=0;
(3)1.25+(
5
6
-
1
4
)×12,
=1.25+(
5
6
×12-
1
4
×12),
=1.25+(10-3),
=1.25+7,
=8.25.

据专家权威分析,试题“怎样简便就怎样算.36×(12+13+14)57×[0.75-(12+0.25)]1.25+(56..”主要考查你对  分数的四则混合运算及应用  等考点的理解。关于这些考点的“档案”如下:

分数的四则混合运算及应用