1st Grade Addition Worksheets
Free addition worksheets with answer key. No login or account needed. Below you can find traditional horizontal and vertical addition problems, word problems, visual problems and much more. A grading column and quick grade scale maker grading a breeze and modified pages help with lower level learners or when just introducing a topic. Great for teachers or for homeschool.
About these worksheets
Practice standard addition problems ranging from simple sums within 5 all the way up to four-digit plus four-digit addition. Worksheets are available in both vertical and horizontal formats and cover key skills like regrouping (carrying), adding multiples of ten, finding missing addends, and solving mixed addition and subtraction problems. These resources align with Common Core standards from kindergarten through fourth grade, giving students structured practice at every level.
Adding Within 100 (horizontal)
- Add two numbers up to 100 to find the total.
- Practice adding when you need to trade 10 ones for 1 ten (carrying).
- Practice adding two-digit numbers with and without carrying
- Solve addition problems where the sum stays within two digits (no answer over 100)
- Work with a mix of two-digit plus two-digit and two-digit plus one-digit problems
Adding Multiples of Ten
- Add a 2-digit number and a multiple of ten within 100 (e.g., 34 + 20).
- Use place value to add tens to a number while keeping the ones digit the same (e.g., 57 + 30 = 87).
- Solve vertical (stacked) addition problems without regrouping when adding tens.
Adding Multiples of Ten (Horizontal)
- Add a 2-digit number and a multiple of ten within 100 (e.g., 34 + 20).
- Use place value to add tens to a number by changing only the tens digit (ones stay the same).
- Count on by tens from a 2-digit number to find the sum (skip-counting by 10s).
Solving Mixed Problems within 20 (+ -)
- Practice finding a missing number in addition and subtraction equations
- Get comfortable seeing the unknown in different spots — at the beginning, middle, or end of an equation