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能用简便方法的用简便方法计算.105×32-3232÷32125×313×0.8×310(17−19)×63−23210.5×[(6.05-3.35)÷1.5](56−34)×25÷120.75×16+34×5−75%.

题目详情
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%.
▼优质解答
答案和解析
(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.