Two Digit Addition Horizontal
Arithmetic Drill · answer format: Number
addition within 100 worksheets
Addition Within 100 Worksheets and Step-by-Step Help
Two-digit addition works when tens are added to tens and ones are added to ones.
Skill routine
Add tens and ones by place value
- Line up the ones digits.
- Add the ones.
- Add the tens.
- Regroup ten ones as one ten when needed.
Practice types
What this page can generate next.
Two Digit Addition Vertical
Arithmetic Drill · answer format: Number
Addition Word Problems Within 100
Word Problem · answer format: Number
Common mistakes
Common addition mistakes
Most addition errors come from counting mistakes, place value confusion, or losing track during regrouping.
Counting the starting number as one
Misaligning tens and ones
Forgetting the regrouped ten
Coverage