Students develop fluency with addition and subtraction facts within 20 and use place-value reasoning to add and subtract one-, two-, and three-digit whole numbers within 1,000, with and without regrouping, including partial sums, partial differences, and mental work with multiples of 10 and 100. They estimate sums and differences by rounding to the nearest ten or hundred, find missing numbers and addends using inverse relationships, and represent computation with equations, models, number lines, expanded form, and standard algorithms. They apply these skills to one- and two-step addition and subtraction problems involving totals, differences, comparisons, remaining amounts, and unknown parts, while checking that solutions are reasonable.
On this page:
- Master skills like “Use partial sums”, “Find a missing addend”, and “Subtract across zeros” with unlimited, free practice problems
- Download (or modify) free worksheets on Addition and Subtraction you can use at home or in class with practice problems across all skills in this group including “Use partial differences”, “Estimate sums by rounding”, “Recall addition facts to 20”.
- Start working on adaptive units like “Addition and Subtraction of Integers - 1 and 2 Digit” or “Addition and Subtraction of Integers - 2 and 3 Digit” that include these skills and will introduce and scaffold the skills carefully for maximum learning.
Addition and Subtraction: Individual Skills
Master 25 individual skills with free practice problems. Mouseover to see the skill's practice problems. Create a free account to track your progress.
Your results
- Add 3-digit numbers with regrouping
- Add 3-digit numbers without regrouping
- Add a 2-digit number and a 1-digit number
- Add multiples of 10 mentally
- Add multiples of 100 mentally
- Add two 2-digit numbers with regrouping
- Add two 2-digit numbers without regrouping
- Estimate differences by rounding
- Estimate sums by rounding
- Find a missing addend
- Find a missing number in a subtraction equation
- Recall addition facts to 20
- Recall subtraction facts within 20
- Solve one-step subtraction word problems
- Solve two-step addition and subtraction problems
- Subtract 3-digit numbers with regrouping
- Subtract 3-digit numbers without regrouping
- Subtract a 1-digit number from a 2-digit number
- Subtract across zeros
- Subtract multiples of 10 mentally
- Subtract multiples of 100 mentally
- Subtract two 2-digit numbers with regrouping
- Subtract two 2-digit numbers without regrouping
- Use partial differences
- Use partial sums
Practice 'Add 3-digit numbers with regrouping'
Select any skill in this group by hovering over the list above. Unlimited free practice problems, automatically graded.
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Download/Modify Free Grade 3 'Addition and Subtraction' Worksheet
Print this free 'Addition and Subtraction' worksheet to practice these skills away from the computer. Click 'Modify' to easily customize this worksheet to your exact needs.
This Worksheet Includes:
- Add 3-digit numbers with regrouping
- Add 3-digit numbers without regrouping
- Add a 2-digit number and a 1-digit number
- Add multiples of 10 mentally
- Add multiples of 100 mentally
- Add two 2-digit numbers with regrouping
- Add two 2-digit numbers without regrouping
- Estimate differences by rounding
Units Teaching These Skills
These adaptive units introduce, teach, or reinforce skills in this group (Addition and Subtraction) through scaffolded problems that grow in difficulty as concepts are understood.