问题
解答题
怎样算简便就怎样算.
|
答案
(1)
×4 9
÷1 5
,4 5
=
÷4 45
,4 5
=
;1 9
(2)
×58+42÷8,1 8
=
×58+42×1 8
,1 8
=(58+42)×
,1 8
=100×
,1 8
=12.5;
(3)36×(
+2 3
-1 6
),3 4
=36×
+36×2 3
-36×1 6
,3 4
=24+6-27,
=30-27,
=3.