① + ÷
②( + )×24
③32﹣1
④ × + ×
① - + -
②3.6÷0.8÷1.25
③ ÷ + ×
④72×( - )
51×102 0.8××12.5 ×7÷×7
83.47﹣(23.47+11) 45×99+45 1÷2.5+2.5×0.8
①772-317+128-283
②2.4÷( -20%)
③1-
④5.125× +2.875÷4
⑤
①
②36×()
③
④
⑤3.24×0.76+3.24×0.24
⑥