## Basic College Mathematics (9th Edition)

$Estimate: 54$ tons $Exact: \displaystyle 53\frac{5}{12}$ tons
We need to find the sum of the newspaper weights: $\displaystyle 28\frac{2}{3}+24\frac{3}{4}$ First, we estimate by rounding: $\displaystyle 28\frac{2}{3}+24\frac{3}{4}$ $\approx 29+25$ $\approx 54$ tons Next, we get the exact answer: $\displaystyle 28\frac{8}{12}+24\frac{9}{12}$ $=\displaystyle 52\frac{17}{12}$ $=\displaystyle 53\frac{5}{12}$ tons The exact result is fairly close to the estimate.