A video showing you how to use RUCSAC to solve two-step addition and subtraction word problems. Sorry about the cut halfway through - somebody knocked on the door!
I did not show this in the video but another way to solve the three step addition is to add two numbers together then add the third number to the total. For example: 28 + 26 = 54 then 54 + 27 = 81. You can also do this when checking your answer using the inverse. For example: 81 - 28 = 53 then 53 - 26 = 27.