问题 解答题
怎样简便怎样计算.
5
8
-
2
5
-
1
5
7
10
-(
3
10
-
1
5
8
7
+
7
8
+
4
8
+
6
7
1-
3
8
-
1
6
6.33+
7
13
+3.77+
6
13
答案

5
8
-
2
5
-
1
5

=

5
8
-(
2
5
+
1
5
),

=

5
8
-
3
5

=

1
40

7
10
-(
3
10
-
1
5
),

=

7
10
-
3
10
+
1
5

=

2
5
+
1
5

=

3
5

8
7
+
7
8
+
4
8
+
6
7

=(

8
7
+
6
7
)+(
7
8
+
4
8
),

=2+1

3
8

=3

3
8

④1-

3
8
-
1
6

=1-

9
24
-
4
24

=

11
24

⑤6.33+

7
13
+3.77+
6
13

=(6.33+3.77)+(

7
13
+
6
13
),

=10.1+1,

=11.1.

判断题
填空题