问题 解答题
脱式计算.
4.82-5.2÷0.8×0.6
5
7
÷[1÷(
2
3
-
1
5
)]
0.8×[1÷(3.2-2.95)].
答案

(1)4.82-5.2÷0.8×0.6,

=4.82-6.5×0.6,

=4.82-3.9,

=0.92;

(2)

5
7
÷[1÷(
2
3
-
1
5
)],

=

5
7
÷[1÷
7
15
],

=

5
7
÷
15
7

=

1
3

(3)0.8×[1÷(3.2-2.95)],

=0.8×[1÷0.25],

=0.8×4,

=3.2.

单项选择题
单项选择题