题目内容
怎样简便就怎样算
| 99999×22222+33333×33334 | 2003×2004÷2004×2004-2003×2004 | ||||||
2.8×(
|
101×
| ||||||
| 9.81×10%+0.5×98.1+0.049×981 | 23×
|
(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×(
+
),
=2.8×
+2.8×
,
=0.4+0.3,
=0.7;
(4)101×
,
=(102-1)×
,
=102×
-1×
,
=99-
,
=98
;
(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×
,
=23×
+16×
,
=(23+16)×
,
=39×
,
=14.
=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×
| 1 |
| 7 |
| 3 |
| 28 |
=0.4+0.3,
=0.7;
(4)101×
| 99 |
| 102 |
=(102-1)×
| 99 |
| 102 |
=102×
| 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 |
| 39 |
| 16 |
| 39 |
=23×
| 14 |
| 39 |
| 14 |
| 39 |
=(23+16)×
| 14 |
| 39 |
=39×
| 14 |
| 39 |
=14.
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