Complete the description of how to find the sums ?6 + 2 and ?6 + (?2) on a number line. To find ?6 + 2, start at 0. Draw the arrow for ?6. Then, from , draw the arrow for 2; the sum is . To find ?6 + (?2), start at 0. Draw the arrow for ?6. Then, from , draw the arrow for ?2; the sum is .