`1,42:0,5+1,42xx8`
`=1,42xx2+1,42xx8`
`=1,42xx(2+8)`
`=1,42xx10`
`=14,2`
1,42:0,5+1,42×81,42:0,5+1,42×8
=1,42×2+1,42×8=1,42×2+1,42×8
=1,42×(2+8)=1,42×(2+8)
=1,42×10=1,42×10
=14,2
1,42:0,5+1,42×81,42:0,5+1,42×8
=1,42×2+1,42×8=1,42×2+1,42×8
=1,42×(2+8)=1,42×(2+8)
=1,42×10=1,42×10
=14,2