问题
解答题
用简便方法计算下列各题: (1)(
(2)(-125+
|
答案
(1)原式=
×12+1 4
×12-1 6
×12=3+2-6=-1;1 2
(2)原式=125×
-1 5
×5 7
=241 5
.6 7
用简便方法计算下列各题: (1)(
(2)(-125+
|
(1)原式=
×12+1 4
×12-1 6
×12=3+2-6=-1;1 2
(2)原式=125×
-1 5
×5 7
=241 5
.6 7