%=5: = = (填小数)。
①4-+
②
③3.06÷0.17×0=
④7÷4÷0.25=
⑤0.43=
⑥1÷100%=
⑦0.875-=
⑧49×÷49×
①8.76- (3.76+2.7)
②2.25×5.9+77.5×0.59
③32×()
①x+80%x=28 ②3x- 1.6=3.8 ③