题目内容
脱式计算(注意能简算的一定要简算哟)
| 3.25×
| ||||||||
25%×1.25×32 | 389.5×35+38.95×650. |
(1)
×2013,
=
×(2012+1),
=
×2012+
×1,
=2011+
,
=2011
;
(2)3.25×
+7.75×
-
,
=
×(3.25+7.75-1),
=
×10,
=6;
(3)25%×1.25×32,
=25%×1.25×4×8,
=(0.25×4)×(1.25×8),
=1×10,
=10;
(4)389.5×35+38.95×650,
=38.95×350+38.95×650,
=38.95×(350+650),
=38.95×1000,
=38950.
2011 |
2012 |
=
2011 |
2012 |
=
2011 |
2012 |
2011 |
2012 |
=2011+
2011 |
2012 |
=2011
2011 |
2012 |
(2)3.25×
3 |
5 |
3 |
5 |
3 |
5 |
=
3 |
5 |
=
3 |
5 |
=6;
(3)25%×1.25×32,
=25%×1.25×4×8,
=(0.25×4)×(1.25×8),
=1×10,
=10;
(4)389.5×35+38.95×650,
=38.95×350+38.95×650,
=38.95×(350+650),
=38.95×1000,
=38950.
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