3rd Grade Mental Math Worksheets and Activities

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).

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).

Worksheet instructions: Multiply by 10, 100 or 1000 to find the missing factor in each problem. Try solving these questions mentally without writing down intermediary steps.

Worksheet instructions: Multiply by 10, 100 or 1000 to find the missing factor in each problem. Try solving these questions mentally without writing down intermediary steps.

Worksheet instructions: Multiply by 10, 100 or 1000 to find the missing factor in each problem. Try solving these questions mentally without writing down intermediary steps.

Worksheet instructions: Multiply by 10, 100 or 1000 to find the missing factor in each problem. Try solving these questions mentally without writing down intermediary steps.

Worksheet instructions: Multiply by 10, 100 or 1000 to find the missing factor in each problem. Try solving these questions mentally without writing down intermediary steps.

Worksheet instructions: Multiply by 10, 100 or 1000 to find the missing factor in each problem. Try solving these questions mentally without writing down intermediary steps.

Worksheet instructions: Solve each problem by adding two 2-digit numbers (no carrying or regrouping). Try to figure out the answers mentally without writing down the steps.Solve each problem by adding two 2-digit numbers (no carrying or regrouping). Try to figure out the answers mentally without writing down the steps.