问题
解答题
能简算的要简算 39.8÷2.5-
2010×
75÷[
6.75÷
|
答案
39.8÷2.5-
×3.6+5.5÷11 2
-360%,5 18
=15.92-5.5×3.6+5.5×3.6-3.6,
=15.92+(5.5×3.6-5.5×3.6)-3.6,
=15.92-3.6,
=12.32;
2010×
,2008 2009
=(2009+1)×
,2008 2009
=2009×
+1×2008 2009
,2008 2009
=2008+
,2008 2009
=2008
;2008 2009
-(17 13
+9 11
×16 39
),3 4
=
-(17 13
+9 11
),4 13
=
-17 13
-4 13
,9 11
=1-
,9 11
=
;2 11
6.75÷
+42.5×0.24,5 12
=6.75×2.4+42.5×0.24,
=67.5×0.24+42.5×0.24,
=(67.5+42.5)×0.24,
=110×0.24,
=(100+10)×0.24,
=24+2.4,
=26.4.