问题 解答题
脱式计算,能简算的要简算.
(1)9003-554÷18×27                
(2)
1
12
+(
5
12
+
1
2
11
24

(3)1110÷[56×(
3
7
-
3
8
)]
(4)4.3-(0.6+2.4÷12)
(5)99×
4
25

(6)48×(
1
4
+
1
6
-
1
12
答案

(1)9003-554÷18×27,

=9003-

277
9
×27,

=9003-831,

=8172;

(2)

1
12
+(
5
12
+
1
2
11
24

=

1
12
+
11
12
÷
11
24

=

1
12
+2,

=2

1
12

(3)1110÷[56×(

3
7
-
3
8
)],

=1110÷[56×

3
7
-56×
3
8
],

=1110÷[24-21],

=1110÷3,

=370;

(4)4.3-(0.6+2.4÷12),

=4.3-(0.6+0.2),

=4.3-0.8,

=3.5;

(5)99×

4
25

=(100-1)×

4
25

=100×

4
25
-1×
4
25

=16-

4
25

=15

21
25

(6)48×(

1
4
+
1
6
-
1
12
),

=48×

1
4
+48×
1
6
-48×
1
12

=12+8-4,

=20-4,

=16.

单项选择题 A1/A2型题
单项选择题 A1/A2型题