① :x= :
②1.8x﹣1.4x=96
3.2+6.8= ×33= 39×101= 0.36÷0.6= 705﹣398≈
-= 3.6÷= 5.4×10%= 0.12= +×3=
①367+33=
②9﹣5.2=
③0.6×0.2=
④﹣=
⑤÷=