问题 解答题
计算:
(1)2-
6
13
÷
9
26
-
2
3
+
18
35
÷0.6×
2
3

(2)[2
1
3
+(5.4-2
2
3
)×1
2
3
]÷6
8
9

(3)62.5%×(1
2
3
+3
1
6
)+
1
6
÷1.6-
5
8

(4)51
2
3
×
3
5
+71
3
4
×
4
7
+91
4
5
×
5
9
答案

(1)2-

6
13
÷
9
26
-
2
3
+
18
35
÷0.6×
2
3

=2-

6
13
×
26
9
-
2
3
+
18
35
×
5
3
×
2
3

=2-

4
3
-
2
3
+
4
7

=2-(

4
3
+
2
3
)+
4
7

=2-2+

4
7

=

4
7

(2)[2

1
3
+(5.4-2
2
3
)×1
2
3
]÷6
8
9

=[2

1
3
+
27
5
×
5
3
-
8
3
×
5
3
]÷6
8
9

=[

7
3
+9-
40
9
]÷6
8
9

=

62
9
×
9
62

=1;

(3)62.5%×(1

2
3
+3
1
6
)+
1
6
÷1.6-
5
8

=62.5%×(1

2
3
+3
1
6
)+
1
6
÷1.6-
5
8

=

5
8
×
29
6
+
1
6
×
5
8
-
5
8

=(

29
6
+
1
6
-1)×
5
8

=4×

5
8

=

5
2

(4)51

2
3
×
3
5
+71
3
4
×
4
7
+91
4
5
×
5
9

=(50+

5
3
)×
3
5
+(70+
7
4
)×
4
7
+(90+
9
5
)×
5
9

=50×

3
5
+
5
3
×
3
5
+70×
4
7
+
7
4
×
4
7
+90×
5
9
+
9
5
×
5
9

═30+1+40+1+50+1,

=123.

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