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

Solve the mystery of the missing numbers in this inviting fact fluency worksheet!

One way to find the missing number in an equation is to use a number line. Your kid will do just that in this set of addition problems.

Use these vocabulary cards with the EL Support Lesson: The Missing Numerator in Equivalent Fractions.

Hunt down the missing numbers in addition, subtraction, multiplication, and division in this varied worksheet!

Practice using ten frames to find missing numbers with this friendly subtraction worksheet!

Track down missing numbers to solve these multi-digit subtraction problems!

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.

Use your addition expertise to find the missing digits in each equation with this second- and third-grade worksheet!

Put your logic skills to the test as you add and subtract large numbers.

Get your child acquainted with the concept of perimeter with this geometry worksheet

This worksheet gives your child great counting practice and gest her familiar with some of the bigger numbers that she's learned.

Does your child need a lift with his counting skills? This elevator-themed worksheet is about counting and finding the numbers in a series.

Kids practice their multiplication facts and get a conceptual start to division with this math worksheet.

This caterpillar has been munching numbers instead of leaves! He's lost some of the numbers, but which ones?

Calling all Sudoku and Ken Ken buffs, we have a new addicting puzzle for you! These are tricky, but a fun spin-off of the popular Ken Ken puzzle.

The rain has washed away numbers in these sequences—can you finish them?

Children will enjoy using their number sense as they complete this fun counting and coloring worksheet.

Test your addition knowledge in this charming worksheet!

Can you count all the way to 100? Help your little math star learn to identify number patterns by filling in the blanks on this hundreds chart.

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