问题 解答题
“我能行”,用简便方法计算:
7
12
-
1
5
)×60
4
7
×
6
13
+
3
7
×
6
13
25
3
8
×8
2
27
×(15×
27
28
)×
2
15
答案

(1)(

7
12
-
1
5
)×60,

=

7
12
×60-
1
5
×60,

=35-12,

=23;

(2)

4
7
×
6
13
+
3
7
×
6
13

=(

4
7
+
3
7
)×
6
13

=

6
13

(3)25

3
8
×8,

=25×8+

3
8
×8,

=200+3,

=203;

(4)

2
27
×(15×
27
28
)×
2
15

=(

2
27
×
27
28
)×(15×
2
15
),

=

1
14
×2,

=

1
7

口语交际,情景问答题
单项选择题