题目内容
简便计算
6.5-3.73+3.5-1.27
7×5.3+0.7×47
46×
.
6.5-3.73+3.5-1.27
7×5.3+0.7×47
46×
| 7 |
| 45 |
(1)6.5-3.73+3.5-1.27
=6.5+3.5-(3.73+1.27),
=10-5,
=5;
(2)7×5.3+0.7×47
=7×5.3+7×4.7,
=7×(5.3+4.7),
=7×10,
=70;
(3)46×
=(45+1)×
,
=45×
+1×
,
=7+
,
=7
.
=6.5+3.5-(3.73+1.27),
=10-5,
=5;
(2)7×5.3+0.7×47
=7×5.3+7×4.7,
=7×(5.3+4.7),
=7×10,
=70;
(3)46×
| 7 |
| 45 |
=(45+1)×
| 7 |
| 45 |
=45×
| 7 |
| 45 |
| 7 |
| 45 |
=7+
| 7 |
| 45 |
=7
| 7 |
| 45 |
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