问题
解答题
用自己喜欢的方法计算.
|
答案
(1)(
+1 12
)×24,1 4
=
×24+1 12
×24,1 4
=2+6,
=8;
(2)
×5 7
+7 9
×2 9
,5 7
=
×(5 7
+7 9
),2 9
=
×1,5 7
=
;5 7
(3)
×11+3 4
,3 4
=
×(11+1),3 4
=
×12,3 4
=9;
(4)46×
,44 45
=(45+1)×
,44 45
=45×
+1×44 45
,44 45
=44+
,44 45
=44
.44 45