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.

Complete the number sentence by counting left and right on a number line. Can your child find all the missing numbers?

Count like a champ! Your kid will find missing numbers in no time when he learns how to use a number line. Now get searching!

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.

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.

Challenge your subtraction skills as you track down the missing digits in each of these problems!

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.

Help students practice looking for clue words, creating drawings, and using other strategies for solving these story problems.

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!

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

Crack the code of the missing starting number with this investigative subtraction worksheet!

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

Show off your skills with subtraction strategies in this helpful worksheet!

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

Children will fill in the missing numbers from 950 to 999 in this number-ordering worksheet.

Test your addition skills with this hands-on math worksheet!

Hop backwards to subtract in this hands-on math worksheet!

Test your addition skills with this helpful hundred chart worksheet!

Children complete an addition chart, then fill in missing addends and sums in this useful practice worksheet.

This adorable turtle is missing his shell! Help finish this picture by connecting the dots and skip counting by five.

This sweet butterfly is missing her wings! Help finish this picture by connecting the dots and skip-counting by five.