4x-0.8=26.2 x+60%x=480 = 2.75:11
-=
3.2+6.08=
6.2+0.01=
×0.42=
8-8÷4=
12÷=
2÷-÷2=
×5÷×5=
÷( + × ) 10.15﹣6.25﹣3.75+8.85
( + )×12+ 65÷ -38× +