# 1.OA.D.8 Worksheets

#### CCSS.MATH.CONTENT.1.OA.D.8

:
"Determine the unknown whole number in an addition or subtraction equation relating three whole numbers."

These worksheets can help students practice this Common Core State Standards skill.

## Worksheets

Worksheet
How many ways can you add up to ten? In this worksheet, kids practice making ten by filling in the missing number in each equation to make it equal ten.
Math
Worksheet
Worksheet
Your can experiment with addition facts here in the math lab. Can he write the missing addition symbols and complete the problems?
Math
Worksheet
Worksheet
Not only can your child practice her math facts with numbers between 1 and 20, she'll also practice writing addition problems with the correct symbols.
Math
Worksheet
Reach For The Stars #4
Worksheet
Reach For The Stars #4
Addition and subtraction fact families are blasting off the page. They're grouped neatly together and ready for your kid to learn them backwards and forwards.
Math
Worksheet
Number Bonds All Around
Worksheet
Number Bonds All Around
Number bonds are a great way for your kids to explore the relationship between addition and subtraction. By filling in the missing numbers, students get experience with fact families.
Math
Worksheet
Worksheet
It’s time for students to make their own number bonds! In this activity, students will be given number sentences to solve and represent using number bonds.
Math
Worksheet
Break the Numbers Down!
Worksheet
Break the Numbers Down!
Students learn to decompose numbers through this fun activity. After being given a number, young mathematicians come up with their own way to decompose the number into two different numbers.
Math
Worksheet
Mystery Number
Worksheet
Mystery Number
Find the mystery number in this intro-to-algebra worksheet that practice places value.
Math
Worksheet
Simple Arithmetic
Worksheet
Simple Arithmetic
Have a ball with this addition and subtraction worksheet! Kids fill in the missing numbers on each beach ball to make its statement true.
Math
Worksheet
Solve the Story Problem
Worksheet
Solve the Story Problem
Practice solving different types of subtraction word problems with this worksheet. Plenty of space is included for students to show their thinking!
Math
Worksheet
Vocabulary Cards: Subtraction Strategies
Worksheet
Vocabulary Cards: Subtraction Strategies
Use these vocabulary cards with the EL Support Lesson Plan: Subtraction Strategies.
Math
Worksheet
Pokeman Problems
Worksheet
Pokeman Problems
Use this unique Pokemon-themed worksheet to give kids fun practice solving word problems that involve subtracting multiples of ten!
Math
Worksheet
Stamp Subtraction
Worksheet
Stamp Subtraction
This subtraction worksheet will help strengthen your students' ability of understanding word problems and they key words involved. Plenty of space is included for students to show their thinking!
Math
Worksheet