55x99简便计算过程????????

2025-06-27 16:10:57
推荐回答(5个)
回答1:

5.5X9.9=55X(100-1)=55X100-55X1=5500-55=5445

回答2:

55×99
=55×(100-1)
=5500-55
=5445

回答3:

55x99
=55x(100-1)
=55X100-55-1
5500-55
5445

回答4:

55×99
=55×(100-1)
=5500-55
=5445

回答5:

55x99
=55x(100-1)
=55x100-55
=5500-55
=5445