问题
解答题
怎样简便就怎么算.
(
(
|
答案
(1)
÷(5 4
÷5 4
),15 4
=
÷5 4
,1 3
=
;15 4
(2)(
+5 6
)÷11 12
,11 12
=(
+5 6
)×11 12
,12 11
=
×5 6
+12 11
×11 12
,12 11
=
+1,10 11
=1
;10 11
(3)(
-5 8
×1 3
)×24,5 4
=(
-5 8
)×24,5 12
=
×24-5 8
×24,5 12
=15-10,
=5;
(4)
×21+5 7
÷2 7
,1 21
=
×21+5 7
×21,2 7
=(
+5 7
)×21,2 7
=1×21,
=21.