计算下面各题.(1)4768-5768÷56×27(2)(0.51÷1.7+4.2)×4.5(3)56÷58+38×49(4)716÷[914×(56-49)].-数学

题文

计算下面各题.
(1)4768-5768÷56×27
(2)(0.51÷1.7+4.2)×4.5
(3)
5
6
÷
5
8
+
3
8
×
4
9
(4)
7
16
÷[
9
14
×(
5
6
-
4
9
)].
题型:解答题  难度:中档

答案

(1)4768-5768÷56×27,
=4768-5768÷56×27,
=4768-103×27,
=4768-2781,
=1987;

(2)(0.51÷1.7+4.2)×4.5,
=(0.3+4.2)×4.5,
=4.5×4.5,
=20.25;

(3)
5
6
÷
5
8
+
3
8
×
4
9

=
4
3
+
1
6

=
3
2


(4)
7
16
÷[
9
14
×(
5
6
-
4
9
)],
=
7
16
÷[
9
14
×
7
18
],
=
7
16
÷
1
4

=
7
4

据专家权威分析,试题“计算下面各题.(1)4768-5768÷56×27(2)(0.51÷1.7+4.2)×4.5(3)5..”主要考查你对  整数的四则混合运算及应用题  等考点的理解。关于这些考点的“档案”如下:

整数的四则混合运算及应用题