用简便方法计算下列各题. 295+137+163 186+(14+179) 563-(163+179) 756-159-241 398-298-47

2025-12-18 04:41:40
推荐回答(1个)
回答1:

(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