3.75:x=3:12 (x-0.6)× =2.25 25%: =x:
= = (4.5-4.5)×15= ( )÷ =
15.5× = ÷20%= 0.125×5×0.8= ×8÷ ×8=
0.7﹣ = × = + =
15÷ = ( + )×6= 1.25× ×8=