48.5×10.2-4.85×2怎么用简便的方法做

48.5×10.2-4.85×2怎么用简便的方法做
2025-06-27 00:57:13
推荐回答(4个)
回答1:


如图

回答2:

48.5×10.2-4.85×2
=48.5×10.2-48.5×0.2
=48.5×(10.2-0.2)
=48.5×10
=485

回答3:

=48.5×10.2-48.5X0.2
=48.5x(10.2-0.2)
=48.5X10
=485

回答4:

48.5×4.85
=48.5×(10+0.1)
=48.5×10+48.5×0.1
=485+4.85
=489.85