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计算(能简算要简算)及解方程79÷115+29×511(34+12-712)×2445÷[1÷(58−14)]56+0.36×56+56×0.6423x÷14=1223x+16x=15x×5=100×34.

题目详情
计算(能简算要简算)及解方程
7
9
÷
11
5
+
2
9
×
5
11
( 
3
4
+
1
2
-
7
12
)×2 4
4
5
÷[1÷(
5
8
1
4
)]
5
6
+0.36×
5
6
+
5
6
×0.64
2
3
1
4
=12
2
3
x+
1
6
x=15
x×5=100×
3
4
▼优质解答
答案和解析

(1)
7
9
÷
11
5
+
2
9
×
5
11

=
7
9
×
5
11
+
2
9
×
5
11

=(
7
9
+
2
9
)×
5
11

=1×
5
11

=
5
11


(2)(
3
4
+
1
2
-
7
12
)×24,
=
3
4
×24+
1
2
×24-
7
12
×24,
=18+12-14,
=30-14,
=16;

(3)
4
5
÷[1÷(
5
8
1
4
)],
=
4
5
÷[1÷
3
8
],
=
4
5
÷
8
3

=
3
10


(4)
5
6
+0.36×
5
6
+
5
6
×0.64,
=
5
6
×(1+0.36+0.64),
=
5
6
×2,
=
作业帮用户 2017-10-08