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用递等式计算9.24÷[1.5×(0.76-0.56)];910÷[12×(65-310)];0.25÷(54-0.25)-14.

题目详情
用递等式计算
9.24÷[1.5×(0.76-0.56)];    
9
10
÷[
1
2
×(
6
5
-
3
10
)];      0.25÷(
5
4
-0.25)-
1
4
▼优质解答
答案和解析
(1)9.24÷[1.5×(0.76-0.56)]
=9.24÷[1.5×0.2]
=9.24÷0.3
=30.8;

(2)
9
10
÷[
1
2
×(
6
5
-
3
10
)]
=
9
10
÷[
1
2
×
9
10
]
=
9
10
÷
9
20

=2;

(3)0.25÷(
5
4
-0.25)-
1
4

=0.25÷1-
1
4

=0.25-
1
4

=0.