69*299+69的简便计算

2025-04-08 03:12:11
推荐回答(2个)
回答1:

69*299+69
=69*(299+1)
=(70-1)*300
=70*300-300
=21000-300
=20700

回答2:

69×299+69
=69×﹙299+1﹚
=20700