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计算:能简算要简算.(1)5.65×35%﹢7.48×720-3.13×0.35;(2)(45+14)÷73+710;(3)83×57+2÷75-57;(4)72×(1112+718+524)

题目详情
计算:能简算要简算.
(1)5.65×35%﹢7.48×
7
20
-3.13×0.35;
(2)(
4
5
+
1
4
)÷
7
3
+
7
10

(3)83×
5
7
+2÷
7
5
-
5
7

(4)72×(
11
12
+
7
18
+
5
24
▼优质解答
答案和解析
(1)5.65×35%﹢7.48×
7
20
-3.13×0.35
=5.65×0.35﹢7.48×0.35-3.13×0.35
=(5.65+7.48-3.13)×0.35
=10×0.35
=3.5;

(2)(
4
5
+
1
4
)÷
7
3
+
7
10

=
21
20
÷
7
3
+
7
10

=
9
20
+
7
10

=
23
20


(3)83×
5
7
+2÷
7
5
-
5
7

=83×
5
7
+2×
5
7
-
5
7

=(83+2-1)×
5
7

=84×
5
7

=60;

(4)72×(
11
12
+
7
18
+
5
24

=72×
11
12
+72×
7
18
+72×
5
24

=66+28+15
=94+15
=109.