This activity will help students reflect on the many potential combinations for a number as they work on identifying a missing part of a whole using dots and a word bank.

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.

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

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.

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.

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.

Gain expertise with addition sentences within 20 in this helpful math worksheet!

These equations have lost their signs! Only one sign — plus or minus — can make each equation true.

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

These Christmas presents are missing some color! Challenge your second grader to review addition and subtraction facts by solving the equations in these gifts.

These Christmas presents are missing some color! Challenge your child to review her addition and subtraction math facts by solving the equations in these gifts.

Here's one way to reinforce addition facts and basic math vocabulary. Your child can add up the numbers and fill in missing signs in these addition problems.

Do some Christmas coloring in this addition and subtraction math worksheet. Kids will fill in missing colors in Santa's presents as they solve math problems.

There are 10 gifts under the Christmas tree, but they're missing their colors. Your child will use his math and creative skills to color them in this worksheet.

Shape up your addition skills with these square puzzles!

Is your child comfortable with adding double-digit numbers? If he's getting there here's a different take on addition problems!

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

Add some color to these Christmas presents in this color-by-number mental math worksheet. Kids will exercise addition and subtraction skills.

Your young learner can have a blast experimenting with addition facts in the Math Lab!

Your child can exercise addition and subtraction skills at Christmas time with this mental math worksheet. It also includes a bonus coloring exercise.

Make the math concept "less than" more clear with a colorful worksheet that gets him practicing with number comparisons to make each equation true.

Practice addition while solving number puzzles in this engaging worksheet for first and second graders!

Strengthen your fluency skills with this beach-themed addition worksheet for first and second graders!

Make your way through a maze of addition problems in this engaging worksheet!

Solve math puzzles so you aren’t puzzled by addition problems in the future!

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

It's time to check those addition skills! Use this to assess your student’s abilities to add within 20.