(65锧34锧66)ᘧ࿾20能用简便方法吗?

2025-05-17 00:24:21
推荐回答(2个)
回答(1):

应该是也可以用简便计算吧,
(65+34+66)×20
=(65+100)×20
=165×20
=3300

回答(2):

=(50+15+100)*20
=(150+15)*20
=3000+300
=3300