问题
解答题
(1)[9
(2)
|
答案
(1)[9
-(8-2008 2009
)]÷2×1 2009
,1 2
=[9+
-8+2008 2009
)]÷2×1 2009
,1 2
=[(9-8)+(
+2008 2009
)]÷2×1 2009
,1 2
=[1+1]÷2×
,1 2
=2÷2×
,1 2
=1×
,1 2
=
;1 2
(2)
,4.75×
+148 19
×1.12 3 8.68-0.36+4.32-1.64
=
,
×19 4
+8 19
×44 3 11 10 (8.68+4.32)-(0.36+1.64)
=
,2+ 242 15 13-2
=
,272 15 11
=
.272 165