计算下面各题,能简便计算的要简便计算.92×54÷92×54; 1021...

2024-12-14 19:52:00
推荐回答(1个)
回答1:

(1)

9
2
×
5
4
÷
9
2
×
5
4

=
9
2
×
5
4
×
2
9
×
5
4

=
9×5×2×5
2×4×9×4

=
25
16


(2)
10
21
÷[
5
6
×(1-
2
3
)]
=
10
21
÷[
5
6
×
1
3
]
=
10
21
÷
5
18

=
12
7


(3)(68-
17
18
)×
1
17

=68×
1
17
-
17
18
×
1
17

=4-
1
18

=3
17
18