0.8x(1.75-0.26-0.24)怎么算=0.8x1.25=1
（1）0.4×（3.2-0.8）÷1.2 =0.4×2.4÷1.2 =0.96÷1.2 =0.8； （2）0.78÷0.26+0.5×0.22 =3+0.11 =3.11； （3）44.28÷0.9÷4.1 =49.2÷4.1 =12； （4）20.88÷0.8-12.9+1.1 =26.1-12.9+1.1 =13.2+1.1 =14.3．
