问题
解答题
下面各题怎样简便就怎样计算. (
(
51÷
|
答案
(1)(
+1 4
)÷2 3
,1 24
=(
+1 4
)×24,2 3
=
×24+1 4
×24,2 3
=6+16,
=22;
(2)
×3 8
+2 5
×2 5
,5 8
=
×(2 5
+3 8
),5 8
=
×1,2 5
=
;2 5
(3)51÷
×4 9
,2 9
=51×
×9 4
,2 9
=
.51 2