问题 解答题
计算下面各题,怎样算简便就怎样算. 
9.43-2.6+8.57-3.4
12×(
1
4
+
1
6
-
1
3
)

375+450÷18×2
5(
4
5
+
1
4
7
3
+
7
10
答案

(1)9.43-2.6+8.57-3.4,

=(9.43+8.57)-(2.6+3.4),

=18-6,

=12;

(2)12×(

1
4
+
1
6
-
1
3
),

=12×

1
4
+12×
1
6
-12×
1
3

=3+2-4,

=5-4,

=1;

(3)375+450÷18×25,

=375+25×25,

=375+625,

=1000;

(4)(

4
5
+
1
4
7
3
+
7
10

=

21
20
÷
7
3
+
7
10

=

9
20
+
7
10

=

23
20

单项选择题 A1/A2型题
单项选择题