问题
解答题
用简便方法计算下列各题.
|
答案
(1)295+137+163
=295+(137+163)
=295+300
=595
(2)186+(14+179)
=186+14+179
=200+179
=379
(3)563-(163+179)
=563-163-179
=400-179
=221
(4)756-159-241
=756-(159+241)
=756-400
=356
(5)398-298-47
=100-47
=53