题目内容

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)
(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.
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