Save guides, add subjects and pick up where you ... between the desert and the mountain top is 42 °C. To subtract -2 from 4, start at number 4 on a number line, and count to the right.

Save guides, add subjects and pick up where you left off with your BBC account. Same signs give a positive: \(3 + (+2) = 3 + 2 = 5\) Same signs give a positive: \(3 - (-2) = 3 + 2 = 5\) Different ...