## Elementary Technical Mathematics

2$\frac{1}{12}$
three truckloads of firewood contains =$\frac{2}{3}$ , $\frac{3}{4}$ , and $\frac{2}{3}$ of a cord Total cords of wirewood she burnt = $\frac{2}{3}$ +$\frac{3}{4}$ + $\frac{2}{3}$ =$\frac{2}{3}\times$ $\frac{4}{4}$ + $\frac{3}{4}\times$ $\frac{3}{3}$ + $\frac{2}{3}\times$ $\frac{4}{4}$ = $\frac{8}{12}$ + $\frac{9}{12}$ + $\frac{8}{12}$ =$\frac{25}{12}$ =2$\frac{1}{12}$