Estimate the sum in each of these math problems. Challenge your child to round to the nearest hundred first, then add the two rounded numbers.

Enjoy helping your little counter add up the values of these coins. He'll be learning an important skill he can use every day.

What do cows like to listen to? To find the answer to this riddle, your kids will need to sharpen their skills in basic addition. So saddle up and let those addition skills go wild!

Did you know that multiplying a number by two is the same thing as adding that number to itself? Use this trick in this lovely math worksheet.

In this worksheet, learn how to add the tens first when using a hundreds chart.

Children skip count by fours to connect the dots and discover the hidden picture.

Children skip count by threes to connect the dots and discover the hidden picture.

Get ready for a deep dive into the properties of addition with this first- and second-grade worksheet!

Kids get a taste of basic algebra in this 2nd grade math worksheet. Kids flip the equations and reverse the operations in order to find the missing number.

Give your kids extra addition practice with this worksheet, which teaches them that it's best to focus on the tens first.

Test your skills with doubles facts in this addition worksheet!

Kids practice reverse addition and subtraction to find the missing numbers in this fun 2nd grade math worksheet.

Kids practice reverse addition and subtraction to find the missing numbers in this challenging 2nd grade math worksheet.

Can you decode the secret message hidden in these addition problems?

Kids practice reverse two-digit addition and subtraction to find the missing numbers in this 2nd grade math worksheet.

Let the dice decide your math practice in this unique addition worksheet!

Introduce your child to basic algebra with this 2nd grade math worksheet. Kids practice reverse addition or subtraction to find the missing numbers.

Kids get an intro to basic algebra by practicing reverse addition and subtraction to find the missing numbers in this challenging 2nd grade math worksheet.

Introduce your child to basic algebra with this 2nd grade math worksheet in which he'll practice reverse addition and subtraction to find the missing numbers.

This hidden animal at the Dot-to-Dot Zoo is 'hopping' to meet you. Kids will skip count by fours to reveal a hidden kangaroo.

Kids try their hand at reverse addition and subtraction in order to find the numbers missing from each equation in this 2nd grade math worksheet.

Sharpen your mental math skills by using compensation to add!

Let’s chart a calculated course with this engaging second-grade addition activity!

Test your addition skills in an underwater adventure with this inviting worksheet!

Draw on your knowledge of doubles to solve these addition problems!

Double up on doubles practice in this worksheet of matching pairs!

Get on a roll with your addition skills in this engaging worksheet!

Explore finding missing starting numbers in addition equations with this engaging hundred-chart worksheet!

Represent ones and tens with crayons in this fun worksheet.