4th Grade Mental Math Worksheets and Activities

In this addition worksheet, students practice adding three 2-digit whole tens (such as 20 + 30 + 40). This helps strengthen mental math skills, enhances place value understanding, and builds fluency with multi-step addition. Worksheet instructions: Find the sum for each problem.

In this worksheet, students practice adding three 2-digit whole tens (such as 20 + 30 + 40). This helps strengthen mental math skills, enhances place value understanding, and builds fluency with multi-step addition. Worksheet instructions: Find the sum for each problem.

In this worksheet, students practice adding two whole tens and two 1-digit numbers. This exercises helps build mental math fluency, reinforce place value, and improve multi-step problem solving (tip: add the "tens" first, then add the "ones"). Worksheet instructions: Find the sum for each problem below.

In this addition worksheet, students practice adding two whole tens (like 20, 40, 60, etc.) and two 1-digit numbers. This helps build mental math fluency, reinforce place value, and improve multi-step problem solving (tip: add the "tens" first, then add the "ones"). Worksheet instructions: Find the sum for each problem below.

In this worksheet, students find the missing number when a 2-digit number is added to a whole ten (like 10, 20, 30, etc.). All questions have a missing addend. Worksheet instructions: Find the missing number in each equation.

In this addition worksheet, students find the missing number when a 2-digit number is added to a whole ten (like 10, 20, 30, etc.). All questions have a missing addend. Worksheet instructions: Find the missing number in each equation.

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.

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.

What is the associative property? The associative property is a math rule that states that in multiplication, the way numbers are grouped does not change the product. Worksheet instructions: Use the associative property to fill in the missing values. Then, solve the word problem that follows.

The associative property is a math rule that states that in multiplication, the way numbers are grouped does not change the product. Worksheet instructions: Use the associative property to fill in the missing values. Then, solve the word problem that follows.

What is a commutative property in math? The commutative property is a math rule that says you can switch the order of numbers when adding or multiplying, and the answer will stay the same. Worksheet instructions: Use the commutative property to fill in the missing values. Then, solve the word problem that follows.

What is the commutative property? The commutative property is a math rule that says you can switch the order of numbers when adding or multiplying, and the answer will stay the same. Worksheet instructions: Use the commutative property to fill in the missing values. Then, solve the word problem that follows.

The commutative property is a math rule that says you can switch the order of numbers when adding or multiplying, and the answer will stay the same. Worksheet instructions: Use the commutative property to fill in the missing values. Then, solve the word problem that follows.

In this subtraction worksheet, the student subtracts 2-digit numbers from whole hundreds. Worksheet instructions: Solve each subtraction problem. Try to figure out the answers mentally without writing down the steps.

In this subtraction worksheet, students subtract 2-digit numbers from whole hundreds. Worksheet instructions: Solve each subtraction problem. Try to figure out the answers mentally without writing down the steps.

Worksheet instructions: Solve each equation below. Try to solve these problems mentally, without writing down intermediary steps.

Worksheet instructions: Solve each equation below. Try to solve these problems mentally, without writing down intermediary steps.

Worksheet instructions: Solve each subtraction problem. Try to figure out the answers mentally without writing down the steps.

Worksheet instructions: Solve each subtraction problem. Try to figure out the answers mentally without writing down the steps.

Worksheet instructions: Solve each subtraction problem. Try to figure out the answers mentally without writing down the steps.

Worksheet instructions: Find the missing numbers in each circle by adding the given numbers. If you find it easy, try to figure out the answers mentally (without writing down the intermediary steps).