210÷5O怎样简便就怎样算求解

2025-02-03 06:05:02
推荐回答(3个)
回答1:

解:口算如下
210÷5O
=(210×2)÷(50×2)
=420÷100
=4.2

回答2:

210÷50
=(210X2)÷(50㐅2)
=420÷100
=4.2

回答3:

解:210÷5O
=21÷5
=21/5