80.5÷1.25怎样简便计算

2024-11-30 02:11:28
推荐回答(3个)
回答1:

80.5÷1.25
=(80.5×0.8)÷(1.25×0.8)
=(80+0.5)×0.8÷1
=80×0.8+0.5×0.8
=64+0.4
=64.4

回答2:

=80.5/(0.5x2.5)
=80.5/0.5/2.5
=161/2.5
=161/(0.5x5)
=161/0.5/5
=322/5
=64.4

回答3:

80.5÷1.25=80.5÷(10÷8)=80.5*8÷10=644÷10=64.4