1st Grade Addition Within 20 Worksheets and Printables

This worksheet helps students practice adding three single-digit numbers with sums up to 20. It strengthens basic addition skills, number sense, and mental math fluency. Worksheet instructions: Find the sum for each problem

In this worksheet, students practice adding two single-digit numbers to find the sum. This worksheet helps build fluency in basic addition and strengthens mental math skills. Worksheet instructions: Find the sum for each problem below.

In this math worksheet, students practice adding two single-digit numbers to find the sum. This worksheet helps build fluency in basic addition and strengthens mental math skills. Worksheet instructions: Find the sum for each problem below.

In this addition worksheet, students practice adding two single-digit numbers to find the sum. This worksheet helps build fluency in basic addition and strengthens mental math skills. Worksheet instructions: Find the sum for each problem below.

In this addition worksheet students practice finding missing addends in equations with sums up to 20. This worksheet strengthens mental math and basic addition skills. Worksheet instructions: Find the missing number in each equation.

This worksheet helps students practice finding missing addends in equations with sums up to 20. It strengthens mental math and basic addition skills. Worksheet instructions: Find the missing number in each equation.

This math worksheet helps students practice finding missing addends in equations with sums up to 20, strengthening mental math and basic addition skills. Worksheet instructions: Find the missing number in each equation.

This addition worksheet helps students practice finding missing addends in equations with sums up to 20, strengthening mental math & basic addition skills. Worksheet instructions: Find the missing number in each equation.

This worksheet helps students practice finding missing addends in equations with sums up to 20, strengthening mental math & basic addition skills. Worksheet instructions: Find the missing number in each equation.

This ten frames worksheet is excellent for helping students learn how numbers add up to 20. Worksheet instructions: Count the counters in each ten frame, then add them.

This ten frames worksheet helps students learn how numbers add up to 20 using ten frames. Worksheet instructions: Count the counters in each ten frame, then add them.

This 10 frames worksheet helps students learn how numbers add up to 20 using ten frames. Worksheet instructions: Count the counters in each ten frame, then add them.

This worksheet helps students improve their math skills by adding two numbers with sums of 20 or less. Worksheet instructions: Solve each addition problem.

Worksheet instructions: How many tens and ones? Fill in the missing numbers in the box.

Worksheet instructions: Help the bear reach the honey by coloring in each box if the answer equals 20.

Worksheet instructions: Help the students reach the school by coloring in each box if the answer equals 20.

Worksheet instructions: Help the giraffe reach the tree by coloring in each box if the answer equals 20.

Worksheet instructions: Help the helmet reach the bicycle by coloring in each box if the answer equals 20.

Worksheet instructions: Help the bottle reach the recycle bin by coloring in each box if the answer equals 20.

Worksheet instructions: Help the present reach the Christmas tree by solving each addition problem.

Worksheet instructions: Help the clothes reach the washing machine by solving each addition problem.

Worksheet instructions: Help George the monkey reach his friend by solving each addition problem.

Worksheet instructions: Help Amy the bird reach the nest by solving each addition problem.

Worksheet instructions: Help Maya, Noa and Michael reach the playground by solving each addition problem.

Worksheet instructions: Count the Fans. How many fans are there when added together?