3rd Grade Addition Strategies Worksheets and Activities

In this addition worksheet, students add whole tens (like 10, 20, 30, etc.) to 2-digit numbers. This helps build fluency with mental math and reinforces place value understanding. Worksheet instructions: Find the sum for each problem below.

In this worksheet, students practice adding whole tens (like 10, 20, 30, etc.) to 2-digit numbers. This helps build fluency with mental math, reinforce place value understanding, and strengthen addition skills in a structured way. Worksheet instructions: Find the sum for each problem below.

In this addition worksheet, students add a 1-digit number and a 3-digit number. Some problems involve regrouping. Worksheet instructions: Find the sum for each problem below.

In this worksheet, students add a 1-digit number to a 3-digit number. Some problems involve regrouping, making it great for building fluency and number sense. Worksheet instructions: Find the sum for each problem below.

In this addition worksheet, students add a 2-digit and two 1-digit numbers in their heads. It’s great mental math practice that helps build number sense and confidence with multi-step addition. Worksheet instructions: Find the sum for each problem below.

In this worksheet, students add one 2-digit and two 1-digit numbers in their heads. It’s great mental math practice that helps build number sense and confidence with multi-step addition. Worksheet instructions: Find the sum for each problem below.

In this addition worksheet students practice addition within 100 by finding missing numbers in equations. It reinforces number relationships and place value. Worksheet instructions: Find the missing number in each problem.

This addition worksheet helps students practice addition within 100 by finding missing numbers in equations. It reinforces number relationships and place value. Worksheet instructions: Find the missing number in each problem.

This math worksheet helps students practice adding two 2-digit numbers without carrying or regrouping. It reinforces place value concepts, including tens and ones, to build a solid foundation for mastering addition. Worksheet instructions:

This worksheet helps students practice adding two 2-digit numbers without carrying or regrouping. It reinforces place value concepts, including tens and ones, to build a solid foundation for mastering addition. Worksheet instructions:

This addition worksheet helps students practice adding two 2-digit numbers without carrying or regrouping. It reinforces place value concepts, including tens and ones, to build a solid foundation for mastering addition. Worksheet instructions:

This addition worksheet helps students practice adding 2-digit and 1-digit numbers within 100 (with carrying). Designed to improve mental math skills, it encourages kids to solve problems quickly and accurately through repeated practice. Worksheet instructions: Find the sum for each problem.

This addition worksheet helps students practice adding 2-digit and 1-digit numbers (with carrying). Designed to improve mental math skills, it encourages kids to solve problems quickly and accurately through repeated practice. Worksheet instructions: Find the sum for each problem.

This mental math worksheet helps students practice adding 2-digit and 1-digit numbers with carrying. Designed to improve mental math skills, it encourages kids to solve problems quickly and accurately through repeated practice. Worksheet instructions: Find the sum for each problem.

This addition worksheet helps students practice adding 2-digit and 1-digit numbers with carrying. Designed to improve mental math skills, it encourages kids to solve problems quickly and accurately through repeated practice. Worksheet instructions: Find the sum for each problem.

In this addition worksheet, students practice vertical addition by adding 3-digit numbers (with regrouping). Worksheet instructions: Find the sum for each addition problem.

In this addition worksheet, students practice adding 3-digit numbers in columns (without carrying or regrouping). Worksheet instructions: Find the sum for each addition problem.

This worksheet helps students practice adding 3-digit numbers in columns (without carrying or regrouping). Worksheet instructions: Find the sum for each addition problem.

This worksheet helps students practice adding two 2-digit numbers in columns (without carrying or regrouping). Worksheet instructions: Find the sum for each addition problem.

This worksheet helps students practice adding two 2-digit numbers in columns without carrying or regrouping. Worksheet instructions: Find the sum for each addition problem.

This worksheet is perfect for improving addition skills, and focuses on adding two 2-digit numbers in columns (with regrouping - also known as carrying). Worksheet instructions: Find the sum for each addition problem (with regrouping).

This worksheet is great for improving addition skills, and focuses on adding two 2-digit numbers in columns (with regrouping - also known as carrying). Worksheet instructions: Find the sum for each addition problem (with regrouping).

Worksheet instructions: Find the sum for each problem below.

Worksheet instructions: Find the sum for each addition problem.

Worksheet instructions: Find the sum for each problem.