Liven up addition for your first grader; this brightly colored worksheet's full of fireworks and fun.

Can your first grader dig through a leafy mess to find the numbers that are added together for each clover? He'll come out of it with stronger addition skills!

Santa has left lots of colorful presents filled with addition facts for your first grader to practice!

First and second graders will LOVE finding the missing numbers in this adorable Valentine’s Day math puzzle!

Ho ho ho! Santa has left lots of colorful presents filled with addition facts for your first grader to practice.

Happy Valentine's Day! Your first grader will color all the candies in this heart-shaped box while solving some sweet math problems.

Prepare your first grader for Valentine's Day with these sweet math problems to help her review her addition math facts.

Enjoy an egg-cellent Easter review of addition facts! Hunt for a solution in each colorful egg, with simple addition problems for your first grader to solve.

Here's an Easter egg hunt with a twist! Each egg in this festive worksheet contains one simple addition problem for your first grader to solve.

Put a little love into math practice with these sweet Valentine's Day addition problems, where your first grader can review his math facts.

The Easter bunny's been busy hiding colorful eggs all over the yard. Each one has a simple addition problem for your first grader to solve.

Children practice addition within 20 in this fall-themed math worksheet.

Children practice addition within 20 in this fall-themed math worksheet.

Children practice addition within 20 in this fall-themed math worksheet.

Children practice addition within 20 in this fall-themed math worksheet.

Children practice addition within 20 in this fall-themed math worksheet.

Enjoy a Halloween-themed race to 100 as students imagine units, rods, and flats as candies, broomsticks, and pumpkins. Players will use this pumpkin race board to regroup between place values up to the hundreds place in order to win the game!

Practice addition within 10 with this Halloween math workheet!

Practice addition within 10 with this Halloween math workheet!

Practice addition within 10 with this Halloween math workheet!

Practice addition within 10 with this Halloween math workheet!

Practice addition within 20 with this Halloween math workheet!

If you want to get your child in the Valentine's Day mood and improve her addition and mental math ability, this pretty printable is sure to do the trick.

Practice addition and subtraction within 20 with this sweet Valentine’s Day math puzzle!