用简便方法计算511×3737377373732002×200020012003×2003-2002×2004 &nbs...
用简便方法计算511×3737377373732002×200020012003×2003-2002×20047.24×35+0.6×2.41-0.65×60%...
用简便方法计算511×3737377373732002×200020012003×2003-2002×2004 7.24×35+0.6×2.41-0.65×60%
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511×
,
=73×7×
,
=259;
2002×
,
=(2001+1)×
,
=2000
;
2003×2003-2002×2004,
=2003×2003-(2003-1)×(2003+1),
=2003×2003-(2003×2003-1),
=2003×2003-2003×2003+1,
=1;
7.24×
+0.6×2.41-0.65×60%,
=7.24×
+
×2.41-0.65×
,
=9×
,
=
.
373737 |
737373 |
=73×7×
10101×37 |
10101×73 |
=259;
2002×
2000 |
2001 |
=(2001+1)×
2000 |
2001 |
=2000
2000 |
2001 |
2003×2003-2002×2004,
=2003×2003-(2003-1)×(2003+1),
=2003×2003-(2003×2003-1),
=2003×2003-2003×2003+1,
=1;
7.24×
3 |
5 |
=7.24×
3 |
5 |
3 |
5 |
3 |
5 |
=9×
3 |
5 |
=
27 |
5 |
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