脱式计算:(1)450÷15+35(2)(1112-16)÷118×13(3)[910-(14÷720)]÷45.-数学

题文

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
题型:解答题  难度:中档

答案

(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