intro 300 Let's subtract signed numbers with Elayn. prompt 1 460 60 300 10 Pause video and write this in your study guide. Find the sum of -12 + 18. 6 What is the difference of -20 - 40? -60 prompt 1 460 60 300 10 Pause the video and try this one your study guide. reminder Remember order of operations: when adding or subtracting move from left to right.