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计算:(1)3.14÷21116×8.0625-(23519-20.58)(2)[(516-378-87.5%)×0.4]÷(1213-3.75÷415)

题目详情
计算:
(1)3.14÷2
11
16
×8.0625-(23
5
19
-20.58)
(2)[(5
1
6
-3
7
8
-87.5%)×0.4]÷(12
1
3
-3.75÷
4
15
▼优质解答
答案和解析
(1)3.14÷2
11
16
×8.0625-(23
5
19
-20.58)
=3.14×
16
43
×
129
16
-(23
5
19
-20.58)
=
157×16×129
50×43×16
-(23
5
19
-20.58)
=9.42-23
5
19
+20.58
=9.42+20.58-23
5
19

=30-23
5
19

=6
14
19


(2)[(5
1
6
-3
7
8
-87.5%)×0.4]÷(12
1
3
-3.75÷
4
15

=[(5
1
6
-3.875-0.875)×0.4]÷(12
1
3
-14
1
16

=[
5
12
×0.4]÷(-
83
48

=
1
6
÷(-
83
48

=-
8
83