Question

这道题怎么写啊？拜托了( •̥́ ˍ •̀ू )

Answer 1

就是化简，化成最简整数比

Answer 2

①12:20
=(3×4):(5×4)
=3:5

②0.8:0.64
=80:64
=5:4

③5/6:10/3
=5:20
=1:4

④5/3:20/7
=35:60
=7:12

⑤0.6km:800m
=600:800
=3:4

⑥500g:2kg
=500:2000
=1:4