81×19+19×19用简便方法计算

81×19+19×19用简便方法计算
2025-02-24 06:30:39
推荐回答(4个)
回答1:

j简便计算:
81×19+19×19
=(81+19)x19
=100x19
=1900

回答2:

81×19+19×19
=(81+19)×19
=100×19
=1900

回答3:

(81+19)+(183+17)

回答4:

47+81+19
用简便方法怎么做