0+504= 24×5= 0.4+8.7= 7.1-3.5= (155+20)-65=
0÷78= 50-20÷5= 543-27-73= 0.81+0.09= 0.75×100=
①86.7-14.2-3.8
②312×4+188×4
③125×89×8
④57×101–57
⑤480-(48+48÷16)