THIS IS THE EDITABLE EXCEL FILE. Adding 3 Addends Worksheets for Adding 2 Digit Numbers With & Without Regrouping 50 UNIQUE Worksheets that can be used for practice / exam purpose. 15 Questions in Each Worksheet. 1.1.5 of the series _ Double digit Addition - 3 Addends. Suitable for - CCSS2.NBT.B.6 Check the preview before buying. PDF VERSION: