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
(
210.5×[(6.05-3.35)÷1.5] (
0.75×16+
|
答案
(1)105×32-3232÷32,
=3360-101,
=3159;
(2)125×3
×0.8×1 3
,3 10
=125×0.8×(
×10 3
),3 10
=100×1,
=100;
(3)(
-1 7
)×63-1 9
,2 3
=
×63-1 7
×63-1 9
,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
×2,2 5
=
×1 12
×2,2 5
=
;1 15
(6)0.75×16+
×5-75%,3 4
=0.75×16+0.75×5-0.75,
=(16+5-1)×0.75,
=20×0.75,
=15.