问题
解答题
用你喜欢的方法计算 (1)1375+360÷90×250 (2)81÷14+17×
(3)
(4)
|
答案
(1)1375+360÷90×250,
=1375+40×250,
=1375+1000,
=2375;
(2)81÷14+17×
,1 14
=81×
+17×1 14
,1 14
=(81+17)×
,1 14
=98×
,1 14
=7;
(3)
×(3 5
+1 7
÷8 21
),2 3
=
×(3 5
+1 7
),4 7
=
×3 5
,5 7
=
;3 7
(4)
×2008,2006 2007
=
×(2007+1),2006 2007
=
×2007+2006 2007
×1,2006 2007
=2007+
,2006 2007
=2007
.2006 2007