Помогите. Даю 35 баллов!)

1а)
$\frac{49}{8} \times \frac{9}{7} = \frac{63}{8} = 7.875$
1б)
$\frac{3}{4} \times \frac{8}{15} + \frac{3}{10} = \frac{2}{5} + \frac{3}{10} = \frac{7}{10} = 0.7$
1в)
$\frac{25}{8} \times 4 - \frac{11}{2} \times \frac{3}{11} = \frac{100}{8} - \frac{3}{2} = 12.5 - 1.5 = 11$
1г)13.85-(3.33+0.47)=13.85-3.8=10.05

2)
$\frac{48}{100} \times \frac{1}{3} + 2.2 \times \frac{13}{11} = 0.16 + 2.6 = 2.76$