Here are some free addition and subtraction worksheets up to 1000:
Addition Worksheets
1. Addition Facts to 1000
<https://www.additionworksheets.net/facts-to-1000/>
This worksheet includes 20 addition problems that require students to calculate the sum of two three-digit numbers.
2. Addition with Regrouping to 1000
<https://www.additionworksheets.net/regrouping-1000/>
This worksheet includes 20 addition problems that require students to regroup when adding three-digit numbers.
3. Addition with Multi-Digit Numbers to 1000
<https://www.additionworksheets.net/multi-digit-1000/>
This worksheet includes 20 addition problems that require students to add three or more digit numbers.
Subtraction Worksheets
1. Subtraction Facts to 1000
<https://www.additionworksheets.net/facts-to-1000-subtraction/>
This worksheet includes 20 subtraction problems that require students to calculate the difference of two three-digit numbers.
2. Subtraction with Regrouping to 1000
<https://www.additionworksheets.net/regrouping-1000-subtraction/>
This worksheet includes 20 subtraction problems that require students to regroup when subtracting three-digit numbers.
3. Subtraction with Multi-Digit Numbers to 1000
<https://www.additionworksheets.net/multi-digit-1000-subtraction/>
This worksheet includes 20 subtraction problems that require students to subtract three or more digit numbers.
Please note that these worksheets are free and designed for educational use only. You can print and use them with your students, but you may not distribute or sell them without permission.
