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(2009•和平区)脱式计算:(1)450÷15+35(2)(1112−16)÷118×13(3)[910−(14÷720)]÷45.

题目详情
(2009•和平区)脱式计算:
(1)450÷15+35
(2)(
11
12
1
6
1
18
×
1
3

(3)[
9
10
−(
1
4
÷
7
20
)]÷
4
5
▼优质解答
答案和解析
(1)450÷15+35,
=30+35,
=65;

(2)(
11
12
1
6
1
18
×
1
3

=
9
12
÷
1
18
×
1
3

=
27
2
×
1
3

=
9
2


(3)[
9
10
−(
1
4
÷
7
20
)]÷
4
5

=[
9
10
-
5
7
]÷
4
5

=
13
70
×
5
4

=
13
56