proszę o pomoc to na jutro zad 2,3 błagam o pomoc proszę wasz wszystkich o uratowanie mi życia plis plis plis

Zad 2 [latex]3 frac{3}{4} + 2 frac{2}{5} = frac{15}{4} + frac{12}{5} = frac{75}{20} + frac{48}{20} = frac{123}{20} = 6 frac{3}{20} [/latex] [latex]7 frac{1}{7} + 4 frac{2}{9} = frac{50}{7} + frac{38}{9} = frac{450}{63} + frac{266}{63} = frac{716}{63} = 11 frac{23}{63} [/latex] [latex]2 - 1 frac{3}{4} = frac{1}{4} [/latex] [latex]4 - frac{7}{8} = 3 frac{1}{8} [/latex] [latex]3 frac{3}{4} - 2 frac{1}{5} = frac{15}{4} - frac{11}{5} = frac{75}{20} - frac{44}{20} = frac{31}{20} = 1 frac{11}{20} [/latex] Zadanie 3  [latex]6 frac{1}{2} * frac{5}{26} = frac{13}{2} * frac{5}{26} = frac{5}{4} [/latex] [latex]2 frac{1}{3}*1 frac{6}{7} = frac{7}{3}* frac{13}{7} = frac{13}{3} = 4 frac{1}{3} [/latex]