问题 解答题
怎样简便就怎样算.
3
10
-
3
10
÷6
3
4
×
5
7
-
3
4
×
1
7
2-
5
11
-
6
11
1
3
+
1
4
+
1
5
)×60.
答案

(1)6÷

3
10
-
3
10
÷6,

=20-

1
20

=19

19
20

(2)

3
4
×
5
7
-
3
4
×
1
7

=(

5
7
-
1
7
)×
3
4

=

4
7
×
3
4

=

3
7

(3)2-

5
11
-
6
11

=2-(

5
11
+
6
11
),

=2-1,

=1;

(4)(

1
3
+
1
4
+
1
5
)×60,

=

1
3
×60+
1
4
×60+
1
5
×60,

=20+15+12,

=47.

判断题
填空题