Ellis showed a subtraction problem, performed both using the traditional regrouping, or borrow-and-carry, algorithm and using an example from the common core. Here’s a screenshot of the two methods.

There are different words you can use for subtraction. You could say '7 take away 3 is 4', '7 subtract 3 equals 4' or '7 minus 3 equals 4'. You could also say 'the difference between 7 and 4 is 3'.