问题
解答题
用简便方法计算下面各题. 23.5-(23.5-9.36) 12.4×1.25-4.4+125% 7.5×25
|
答案
(1)23.5-(23.5-9.36),
=23.5-23.5+9.36,
=0+9.36,
=9.36;
(2)12.4×1.25-4.4+125%,
=(12.4-4.4)×1.25,
=8×1.25,
=10;
(3)7.5×25
+1.5×25.75+25.75,3 4
=(7.5+1.5+1)×25.75,
=10×25.75,
=257.5.