4.21*99+42.1简便计算

4.21*99+42.1简便计算
2025-04-15 09:09:08
推荐回答(1个)
回答1:

4.21*99+42.1简便计算:
解:
4.21x99+42.1
=4.21x(99+1)
=4.21x100
=421