问题
解答题
怎样算简便就怎样算: 2008×
72.5+12.5+12.5÷
[(
(6×12.5+12.5×5)×
|
答案
(1)2008×2006 2007
=(2007+1)×
,2006 2007
=2007×
+2006 2007
,2006 2007
=2006+
,2006 2007
=2006
;2006 2007
(2)72.5+12.5+12.5÷1 6
=72.5+12.5+75,
=160;
(3)[(
+18 9
)×1 3
-0.25]÷3 4 1 12
=[
×8 9
+3 4
×4 3
-3 4
]÷1 4
,1 12
=[
+1-2 3
]÷1 4
,1 12
=
×12+12-2 3
×12,1 4
=8+12-3,
=17,
(4)(6×12.5+12.5×5)×
÷5 33 1 8
=[12.5×(6+5)]×
÷5 33
,1 8
=
×11×25 2
×8,5 33
=
(166500 3
).2 3