×=
× =
3÷=
÷ 3=
=
0.48×=
×÷×=
20%x+7.5=13.5 50:14=x:70 =
①
②
③
④
⑤
⑥
⑤36:96=x:12
⑥6:1.2=x:1.5
①20%x=12
②x-64%x=144
③17%x+18%x=14
④20+50%x=45