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脱式计算.(175+225)÷60095%+10÷20038×45÷38×45(455-12.5×4)÷8.1.

题目详情
脱式计算.
(175+225)÷600                  
95%+10÷200
3
8
×
4
5
÷
3
8
×
4
5
                
(455-12.5×4)÷8.1.
▼优质解答
答案和解析
(1)(175+225)÷600
=400÷600
=
2
3


(2)95%+10÷200
=95%+0.05
=1;

(3)
3
8
×
4
5
÷
3
8
×
4
5

=(
3
8
÷
3
8
)×(
4
5
×
4
5

=1×
16
25

=
16
25


(4)(455-12.5×4)÷8.1
=(455-50)÷8.1
=405÷8.1
=50.