Question

Compare how you would model And récord finding the sum And difference of two rocks weighing 2/8 pound And 3/8 pound .

Answer 1

To find the sum and difference of the two rocks, you would do:

$\frac{3}{8} + \frac{2}{8} = \frac{3+2}{8} =\boxed{\bf{\frac{5}{8}}}\\\\\\ \frac{3}{8} - \frac{2}{8} = \frac{3-2}{8} =\boxed{\bf{\frac{1}{8}}}$