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计算15+7×(1112-58)20-6.25÷(1÷2)8.59-5÷19-719÷12(45+14)×13+70%

题目详情
计算
1
5
+7×(
11
12
-
5
8
20-6.25÷(1÷2)
8.59-5÷19-
7
19
÷
1
2
4
5
+
1
4
)×
1
3
+70%
▼优质解答
答案和解析
1
5
+7×(
11
12
-
5
8
),
=
1
5
+7×
7
24

=
1
5
+
49
24

=
269
120


②20-6.25÷(1÷2),
=20-6.25÷0.5,
=20-12.5,
=7.5;

③8.59-5÷19-
7
19
÷
1
2

=8.59-
5
19
-
14
19

=8.59-(
5
19
+
14
19
),
=8.59-1,
=7.59;

④(
4
5
+
1
4
)×
1
3
+70%,
=
21
20
×
1
3
+
7
10

=
7
20
+
7
10

=
21
20