Adding large numbers becomes easy when you know how to round. Add two groups of numbers, round them to the nearest 10, then add again.

Practice adding tens with a visual model in this helpful worksheet!

Use these vocabulary cards with the EL Support Lesson Plan: Adding Within 20.

Give your little financier a hand with adding coins. He'll add coins in his head and tally the amount to figure out the price of the item shown.

Help the frog catch the fly! This entertaining math game will have you students practice adding and subtracting within 20 on a number line.

First graders will enjoy adding with this fruit and vegetable-themed worksheet!

First graders will enjoy adding with this fruit and vegetable-themed worksheet!

Your child can get a grip on number relationships by adding and subtracting the same numbers within a fact family, a great method for memorizing math facts.

Go over adding two-digit numbers to one-digit numbers with this helpful worksheet.

Try adding groups of bees, butterflies, and other assorted bugs in this beneficial worksheet!

First graders will enjoy adding with this fruit and vegetable-themed worksheet!

First graders will enjoy adding with this colorful fruit- and vegetable-themed worksheet!

First graders will enjoy adding with this fruit and vegetable-themed worksheet!

First graders will enjoy adding with this fruit and vegetable-themed worksheet!

First graders will enjoy adding with this colorful fruit and vegetable-themed worksheet!

First graders will have fun adding with this fruit and vegetable-themed worksheet!

Help your students use their knowledge of place value to add or subtract 10. By understanding how numbers are made of tens and ones, students learn how to add and subtract 10 with ease.

Practice adding ten to any number with this hundreds chart that helps kids master counting and place value.

This hundred chart is the perfect way for kids to show what they've learned as far as adding on a hundred chart.

Practice finding missing numbers while adding within 20 using ten frames!

Practice adding tens on an open number line with this first-grade math worksheet!

Kids solve addition and subtraction problems with one- and two-digit numbers to crack the code and find the mystery word on this first grade math worksheet.

The hundreds chart is great for adding tens. Help Stephanie figure out how many beads she bought by moving down the chart.

This colorful worksheet allows you to combine your second grader's love of art with at-home addition practice with adding double-digits!

Get more practice adding tens on an open number line with this first-grade math worksheet!

Get even more practice adding tens on an open number line with this first-grade math worksheet!

Practice adding two-digit numbers on open number lines with this inviting addition worksheet!

If your child is looking for a number challenge, we've got the worksheet for her. She may be a whiz at adding two numbers, but can she add three numbers?

Use the worksheet, Holiday Shopping 2, to help your first and second graders practice adding or subtracting word problems. Learners will answer the problems and then discuss their answers with partners to show their understanding.

Get more practice adding two-digit numbers on open number lines with this inviting addition worksheet!