问题
解答题
怎样简便怎样算 20.2×8-10.2÷0.125 4×27%×2.5
(
[
|
答案
(1)20.2×8-10.2÷0.125
=161.6-81.6,
=80;
(2)4×27%×2.5
=4×2.5×27%,
=2.7;
(3)
÷(14 25
+7 5
)14 25
=
÷14 25
,49 25
=
;2 7
(4)(
-3 4
×3 4
)÷5 6 3 2
=(
-3 4
)÷5 8
,3 2
=
×1 8
,2 3
=
;1 12
(5)
×9+7 8 7 8
=(9+1)×
,7 8
=10×
,7 8
=
;35 4
(6)[
-(5 6
+2 5
)]×1 3 5 7
=[
-5 6
]×11 15
,5 7
=
×1 10
,5 7
=
.1 14