问题
解答题
用简便方法计算下面各题 463-198= 4.75×4.75+4
|
答案
(1)463-198
=463-200+2
=263+2
=265;
(2)4.75×4.75+4
+43 4
×4.253 4
=4.75×4.75+4.75×1+4.75×4.25
=4.75×(4.75+1+4.25)
=4.75×10
=47.5.
用简便方法计算下面各题 463-198= 4.75×4.75+4
|
(1)463-198
=463-200+2
=263+2
=265;
(2)4.75×4.75+4
+43 4
×4.253 4
=4.75×4.75+4.75×1+4.75×4.25
=4.75×(4.75+1+4.25)
=4.75×10
=47.5.