Give students practice adding three-digit numbers within 1,000! 

Children will put their three-digit addition skills to the test as they solve 23 practice problems in this math worksheet.

Put your addition skills to the test with these puzzle boxes for second and third graders!

Can your little math whiz add up sums quickly in his head? Teach him to estimate before adding, a great skill to put to use in everyday life!

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.

Add like mad with our thrilling addition worksheet! This three-minute math drill gets your child racing to complete all the addition equations on the page.

Practice place value, rounding and addition, all in one worksheet! Your child will learn to add up estimated sums quickly in his head.

Count up the shapes to solve each multiplication equation! This worksheet is a great way to help a visual learner nail down the concept of multiplication.

Learners will solve 20 two- and three-digit addition problems in this versatile practice worksheet.

Children make the connection between addition and multiplication in this repeated groups worksheet.

Practice three-digit addition with regrouping in this set of 36 problems.

Use this resource to assess students’ abilities to solve a variety of word problems.

Bolster your third grader's addition skills with at-home practice in three-digit addition.

Children will practice adding decimals to the hundredths place in this colorful math worksheet.

Put your addition skills to the test with these puzzle boxes for second and third graders!

Children practice adding integers and decimals to the thousandths place in this practice worksheet.

Use this winter-themed resource with your students to practice multi-step word problems with mixed operations.

Addition doesn't have to be puzzling—practice finding sums with these puzzle boxes!

Use your addition and decoding skills to solve eight problems in this fun math puzzle!

Kids solve addition problems with three-digit addends using regrouping on this third grade math worksheet.

Learners solve 12 three- and four-digit problems as they work on their multidigit addition skills.

Put a little silliness into math practice with these April Fools' Day word problems!

Packed with addition problems requiring regrouping, this worksheet is a perfect way to practice addition with carrying.

Searching for a worksheet that practices addition regrouping? This printable is perfect for practicing addition skills like carrying the tens column.

Practice adding with this third grade addition worksheet. Your child will hone his addition skills.

What do sea monsters eat? Solve the math problems in this worksheet to reveal the answer! This math worksheets gets kids to build math and spelling skills.

Challenge your third grade mathematicians with these addition and subtraction word problems. This exercise is designed to assess your students' math level at the beginning of third grade.

This simple worksheet is packed with two-digit and three-digit subtraction problems.

How many shells did Sally sell by the seashore? Get your student in gear for math with this addition worksheet.

Not only does this worksheet bolster kids' addition skills, it's a great mental math exercise, too.