The jump strategy is a way of adding or subtracting numbers by jumping over by increments of 10s or 1s on the number line.
Jump strategy for addition
Perhaps it is obvious that the jump strategy can help you get the sum or the difference quickly.
For example, see how quick you can get an answer for 43 + 22.
It could have taken you a lot longer to write down the addition problem using paper and pencil and then do the math. By the same token, using your fingers to keep adding 1 to 43 is time-consuming!
Jump strategy for subtraction