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计算.8470-104×65;0.6×(5.3-1.7)÷0.9;5.2÷0.8×6+42;13÷(23-25)×35;[12-(34-35)]÷710.

题目详情
计算.
8470-104×65;   
0.6×(5.3-1.7)÷0.9;    5.2÷0.8×6+42;
1
3
÷(
2
3
-
2
5
)×
3
5
[
1
2
-(
3
4
-
3
5
)]÷
7
10
▼优质解答
答案和解析
(1)8470-104×65,
=8470-(100+4)×65,
=8470-100×65-4×65,
=8470-6500-260,
=1710;

(2)0.6×(5.3-1.7)÷0.9,
=0.6×3.6÷0.9,
=0.6×(3.6÷0.9),
=0.6×4,
=2.4;

(3)5.2÷0.8×6+42,
=39+42,
=81;

(4)
1
3
÷(
2
3
-
2
5
)×
3
5

=
1
3
÷
4
15
×
3
5

=
1
3
×
15
4
×
3
5

=
3
4


(5)[
1
2
-(
3
4
-
3
5
)]÷
7
10

=[
1
2
-
3
20
7
10

=
7
20
×
10
7

=
1
2