Summit Addition Worksheet Summit Addition Practice Two-Digit Addition Within 50 • US Standard Algorithm Name: Date: Score: / 30 Algorithm Guide: 1. Add the ones column first. 2. Regroup 10 ones into the box as 1 ten if needed. 3. Add all digits in the tens column. 2 3 1 4 1 8 1 5 3 1 1 2 2 7 1 6 2 4 2 3 1 9 2 4 1 5 2 1 2 6 1 8 3 3 1 6 1 7 2 5 2 0 1 9 2 8 1 4 1 6 2 2 2 9 1 3 3 5 1 3 1 4 2 8 2 2 1 7 2 5 1 7 1 1 3 4 1 8 2 6 3 2 1 5 2 9 1 8 2 6 2 1 1 6 2 7 1 4 3 3 2 3 1 9 2 5 2 4 1 7 2 9 1 3 3 2 2 8 1 9 Check your work: Did you remember to add the regrouped ten? 30 Problems • Addition Within 50