问题 解答题
4
1
3
+3.2+5
2
3
+6.8=
25×(8×0.4)×1.25=
7
4
15
-(2
4
15
-
1
23
)=
11
12
+
7
18
+
5
24
)×72=
93.5÷3
1
2
÷
2
7

16÷2.5=.
答案

(1)4

1
3
+3.2+5
2
3
+6.8,

=4

1
3
+3
1
5
+5
2
3
+6
4
5

=(4

1
3
+5
2
3
)+(3
1
5
+6
4
5
),

=10+10,

=20;

(2)25×(8×0.4)×1.25,

=(25×0.4)×(8×1.25),

=10×10,

=100;

(3)7

4
15
-(2
4
15
-
1
23
),

=7

4
15
-2
4
15
+
1
23

=5+

1
23

=5

1
23

(4)(

11
12
+
7
18
+
5
24
)×72,

=

11
12
×72+
7
18
×
72+
5
24
×
72,

=66+28+15,

=109;

(5)93.5÷3

1
2
÷
2
7

=93

1
2
÷3
1
2
÷
2
7

=93

1
2
÷(
2
7
×
7
2
),

=93

1
2
÷1,

=93

1
2

(6)16÷2.5,

=(16×4)÷(2.5×4),

=64÷10,

=6.4.

单项选择题 A1/A2型题
单项选择题 B型题