问题
解答题
怎样简便就怎样算
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答案
(1)99999×22222+33333×33334,
=33333×3×22222+33333×33334,
=33333×(66666+33334)
=33333×100000,
=3333300000;
(2)2003×2004÷2004×2004-2003×2004,
=2003×2004-2003×2004,
=0;
(3)2.8×(
+1 7
),3 28
=2.8×
+2.8×1 7
,3 28
=0.4+0.3,
=0.7;
(4)101×
,99 102
=(102-1)×
,99 102
=102×
-1×99 102
,99 102
=99-
,99 102
=98
;1 34
(5)9.81×10%+0.5×98.1+0.049×981,
=9.81×0.1+5×9.81+4.9×9.81,
=9.81×(0.1+5+4.9),
=9.81×10,
=98.1;
(6)23×
+14×14 39
,16 39
=23×
+16×14 39
,14 39
=(23+16)×
,14 39
=39×
,14 39
=14.