能用简便方法的用简便方法计算.105×32-3232÷32125× 3 1 3 ×0.8× 3 10 ( 1

能用简便方法的用简便方法计算.105×32-3232÷32125× 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% .

(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.
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