问题 解答题
脱式计算
[1-(
1
3
+
1
5
)]×
5
26
13
4
+7÷(
37
12
-
13
8
408+540÷18×2446×2.2÷(3.3+5.9)
答案

(1)[1-(

1
3
+
1
5
)]×
5
26

=[1-

8
15
5
26

=

7
15
×
5
26

=

7
78

(2)

13
4
+7÷(
37
12
-
13
8
),

=

13
4
+7÷
35
24

=

13
4
+
24
5

=

161
20

(3)408+540÷18×24,

=408+30×24,

=408+720,

=1128;

(4)46×2.2÷(3.3+5.9),

=46×2.2÷9.2,

=101.2÷9.2,

=11.

单项选择题
单项选择题