问题 解答题
能用简便方法的用简便方法计算.
105×32-3232÷32
125×3
1
3
×0.8×
3
10

(
1
7
-
1
9
)×63-
2
3

210.5×[(6.05-3.35)÷1.5]
(
5
6
-
3
4
2
5
÷
1
2

0.75×16+
3
4
×5-75%
答案

(1)105×32-3232÷32,

=3360-101,

=3159;

(2)125×3

1
3
×0.8×
3
10

=125×0.8×(

10
3
×
3
10
),

=100×1,

=100;

(3)(

1
7
-
1
9
)×63-
2
3

=

1
7
×63-
1
9
×63-
2
3

=9-7-

2
3

=2-

2
3

=1

1
3

(4)210.5×[(6.05-3.35)÷1.5],

=210.5×[(6.05-3.35)÷1.5],

=210.5×[2.7÷1.5],

=210.5×1.8,

=378.9;

(5)(

5
6
-
3
4
)×
2
5
÷
1
2

=(

10
12
-
9
12
)×
2
5
×2,

=

1
12
×
2
5
×2,

=

1
15

(6)0.75×16+

3
4
×5-75%,

=0.75×16+0.75×5-0.75,

=(16+5-1)×0.75,

=20×0.75,

=15.

单项选择题
单项选择题