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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×
-3.13×0.35;
(2)(
+
)÷
+
;
(3)83×
+2÷
-
;
(4)72×(
+
+
)
(1)5.65×35%﹢7.48×
7 |
20 |
(2)(
4 |
5 |
1 |
4 |
7 |
3 |
7 |
10 |
(3)83×
5 |
7 |
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×
-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)(
+
)÷
+
=
÷
+
=
+
=
;
(3)83×
+2÷
-
=83×
+2×
-
=(83+2-1)×
=84×
=60;
(4)72×(
+
+
)
=72×
+72×
+72×
=66+28+15
=94+15
=109.
7 |
20 |
=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 |
7 |
5 |
5 |
7 |
=83×
5 |
7 |
5 |
7 |
5 |
7 |
=(83+2-1)×
5 |
7 |
=84×
5 |
7 |
=60;
(4)72×(
11 |
12 |
7 |
18 |
5 |
24 |
=72×
11 |
12 |
7 |
18 |
5 |
24 |
=66+28+15
=94+15
=109.
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