Math Addition with Regrouping, 2 Digit Addition Worksheet #5 In order to perform the addition with carry over, it must have the following features: ∗Addition with carry over is applied with at least two-digit values. ∗At least one of the values in the sum of the digits must be above the number 9. All the values in the units place must be added first.If this value is 9 or less, then the value is ...