4-2/3+3 5/12-2 1/4помогите решить

4-2/3+3 5/12-2 1/4= 3,5

1) $4- \frac{2}{3} = \frac{4}{1} - \frac{2}{3} = \frac{12}{3} - \frac{2}{3} = \frac{10}{3}$ =3 1/3

2) $3 \frac{5}{12} - 1 \frac{1}{4} = \frac{41}{12}- \frac{5}{4} = \frac{41}{12} - \frac{15}{12} = \frac{26}{12}= \frac{13}{6}=2 \frac{1}{6}$

3) $\frac{10}{3} + \frac{13}{6} = \frac{20}{6} + \frac{13}{6} = \frac{33}{6} = 3 \frac{3}{6} =3 \frac{1}{2}=3,5$