题目内容
用简便方法计算下面各题
463-198=
4.75×4.75+4
+4
×4.25=
463-198=
4.75×4.75+4
| 3 |
| 4 |
| 3 |
| 4 |
(1)463-198
=463-200+2
=263+2
=265;
(2)4.75×4.75+4
+4
×4.25
=4.75×4.75+4.75×1+4.75×4.25
=4.75×(4.75+1+4.25)
=4.75×10
=47.5.
=463-200+2
=263+2
=265;
(2)4.75×4.75+4
| 3 |
| 4 |
| 3 |
| 4 |
=4.75×4.75+4.75×1+4.75×4.25
=4.75×(4.75+1+4.25)
=4.75×10
=47.5.
练习册系列答案
相关题目