问题
解答题
能简算的要简算
|
答案
(1)40%×
+60%×2 3
,2 3
=(40%+60%)×
,2 3
=1×
,2 3
=
;2 3
(2)20%×
-20%×5 4
,1 4
=20%×(
-5 4
),1 4
=20%×1,
=0.2;
(3)
×35%+0.25×65%,1 4
=0.25×(35%+65%),
=0.25×1,
=0.25;
(4)75%×125-75%×25,
=75%×(125-25),
=0.75×100,
=75;
(5)(
+2 3
)×45,3 5
=
×45+2 3
×45,3 5
=30+27,
=57;
(6)15×40%+85×40%,
=(15+85)×0.4,
=100×0.4,
=40.