Regrouping involves changing a number from one form to an equivalent form. In the process, the number is renamed. Regrouping is helpful in doing arithmetic computations such as the following:
In long form, the regrouping is as follows (One of the tens in 43 is regrouped with the ones):
|10||+||7 = 17|
In short form, the regrouping is as follows:
Did you know?
Many years ago, the regrouping shown in the example was called borrowing. Regrouping is more descriptive of the action needed to solve the problem.
Also called trading