CCSS

These are the resources that support this Common Core Standard.

CCSS.MATH.CONTENT.1.OA.D.8 - Determine the unknown whole number in an addition or subtraction equation relating three whole numbers. For example, determine the unknown number that makes the equation true in each of the equations 8 + ? = 11, 5 = ? – 3, 6 + 6 = ?.

Displaying 1 - 42 of 42 resources:

Thumbnail Image Title Description Curriculum Nodes
Math Worksheets

Math Worksheet Collection: The Language of Math

This collection aggregates all the math worksheets around the topic of the Language of Math, or converting words into math expressions. There are a total of 264 worksheets. Place Value, Addition Facts to 25, Addition Facts to 100, Numerical and Algebraic Expressions, Numerical Expressions, Variable Expressions, Fractions and Mixed Numbers, Subtraction Facts to 25 and Subtraction Facts to 100
Test Prep

Test Prep Interactive Quizzes

Test Prep Interactive Quizzes are an excellent way for students to review key concepts. Each Test Prep quiz has ten multiple choice questions.

Addition Facts to 10, Addition Facts to 25, Addition Facts to 100, Place Value, Subtraction Facts to 100, Definition of an Angle, Solving One-Step Equations, Graphs of Linear Functions, Slope, Slope-Intercept Form and Counting
INSTRUCTIONAL RESOURCE: Tutorial: How to Create a Fact Family

INSTRUCTIONAL RESOURCE: Tutorial: How to Create a Fact Family

INSTRUCTIONAL RESOURCE: Tutorial: How to Create a Fact Family

Learn how to create fact families in this tutorial.

Addition Expressions and Equations and Subtraction Expressions and Equations
INSTRUCTIONAL RESOURCE: Tutorial: Solving Addition and Subtraction Equations

INSTRUCTIONAL RESOURCE: Tutorial: Solving Addition and Subtraction Equations

INSTRUCTIONAL RESOURCE: Tutorial: Solving Addition and Subtraction Equations

Learn how to solve addition and subtraction equations using column addition and subtraction techniques.

Addition Expressions and Equations and Subtraction Expressions and Equations
INSTRUCTIONAL RESOURCE: Tutorial: Using Fact Families to Solve Equations

INSTRUCTIONAL RESOURCE: Tutorial: Using Fact Families to Solve Equations

INSTRUCTIONAL RESOURCE: Tutorial: Using Fact Families to Solve Equations

Learn how to use fact families to generate and solve addition and subtraction equations.  

Addition Expressions and Equations and Subtraction Expressions and Equations
Interactive Math Game, Fact Fam

Interactive Math Game: Fact Fam

Interactive Math Game: Fact Fam

In this game students analyze fact families with missing terms. They identify the missing term to complete the fact family.

Addition Expressions and Equations and Subtraction Expressions and Equations
Test Prep Interactive Quiz--Sums to 10

Test Prep Interactive Quiz--Sums to 10

Test Prep Interactive Quiz--Sums to 10

This is part of a collection of self-scoring interactive math quizzes on a variety of topics.

Addition Facts to 10
Test Prep Interactive Quiz--Sums to 100

Test Prep Interactive Quiz--Sums to 100

Test Prep Interactive Quiz--Sums to 100

This is part of a collection of self-scoring interactive math quizzes on a variety of topics.

Addition Facts to 100
Test Prep Interactive Quiz--Sums to 20

Test Prep Interactive Quiz--Sums to 20

Test Prep Interactive Quiz--Sums to 20

This is part of a collection of self-scoring interactive math quizzes on a variety of topics.

Addition Facts to 25
Worksheet: Fact Families

Worksheet: Fact Families

Worksheet: Fact Families

Given a fact family, complete the equations.

Addition Expressions and Equations and Subtraction Expressions and Equations
Worksheet

Worksheet: Find the Missing Number, Worksheet 1

Worksheet: Find the Missing Number, Worksheet 1

This is part of a collection of math worksheets in which students are asked to find the missing value from addition equations.

Addition Facts to 25
WorksheetThumbnail.jpg

Worksheet: Find the Missing Number, Worksheet 10

Worksheet: Find the Missing Number, Worksheet 10

This is part of a collection of math worksheets in which students are asked to find the missing value from addition equations.

Addition Facts to 25
WorksheetThumbnail.jpg

Worksheet: Find the Missing Number, Worksheet 2

Worksheet: Find the Missing Number, Worksheet 2

This is part of a collection of math worksheets in which students are asked to find the missing value from addition equations.

Addition Facts to 25
WorksheetThumbnail.jpg

Worksheet: Find the Missing Number, Worksheet 3

Worksheet: Find the Missing Number, Worksheet 3

This is part of a collection of math worksheets in which students are asked to find the missing value from addition equations.

Addition Facts to 25
WorksheetThumbnail.jpg

Worksheet: Find the Missing Number, Worksheet 4

Worksheet: Find the Missing Number, Worksheet 4

This is part of a collection of math worksheets in which students are asked to find the missing value from addition equations.

Addition Facts to 25
WorksheetThumbnail.jpg

Worksheet: Find the Missing Number, Worksheet 5

Worksheet: Find the Missing Number, Worksheet 5

This is part of a collection of math worksheets in which students are asked to find the missing value from addition equations.

Addition Facts to 25
WorksheetThumbnail.jpg

Worksheet: Find the Missing Number, Worksheet 6

Worksheet: Find the Missing Number, Worksheet 6

This is part of a collection of math worksheets in which students are asked to find the missing value from addition equations.

Addition Facts to 25
WorksheetThumbnail.jpg

Worksheet: Find the Missing Number, Worksheet 7

Worksheet: Find the Missing Number, Worksheet 7

This is part of a collection of math worksheets in which students are asked to find the missing value from addition equations.

Addition Facts to 25
WorksheetThumbnail.jpg

Worksheet: Find the Missing Number, Worksheet 8

Worksheet: Find the Missing Number, Worksheet 8

This is part of a collection of math worksheets in which students are asked to find the missing value from addition equations.

Addition Facts to 25
WorksheetThumbnail.jpg

Worksheet: Find the Missing Number, Worksheet 9

Worksheet: Find the Missing Number, Worksheet 9

This is part of a collection of math worksheets in which students are asked to find the missing value from addition equations.

Addition Facts to 25
Worksheet: Solving Addition Equations Using Fact Families

Worksheet: Solving Addition Equations Using Fact Families

Worksheet: Solving Addition Equations Using Fact Families

This is part of a collection of math worksheets on the topic of solving addition equations.

Addition Expressions and Equations
Worksheet: Solving Subtraction Equations Using Fact Families

Worksheet: Solving Subtraction Equations Using Fact Families

Worksheet: Solving Subtraction Equations Using Fact Families

This is part of a collection of math worksheets on the topic of solving subtraction equations.

Subtraction Expressions and Equations
Worksheet: Solving Subtraction Equations, Worksheet 1

Worksheet: Solving Subtraction Equations, Worksheet 1

Worksheet: Solving Subtraction Equations, Worksheet 1

This is part of a collection of math worksheets on the topic of solving subtraction equations.

Subtraction Facts to 25
Worksheet: Solving Subtraction Equations, Worksheet 2

Worksheet: Solving Subtraction Equations, Worksheet 2

Worksheet: Solving Subtraction Equations, Worksheet 2

This is part of a collection of math worksheets on the topic of solving subtraction equations.

Subtraction Facts to 25
Worksheet: Solving Subtraction Equations, Worksheet 3

Worksheet: Solving Subtraction Equations, Worksheet 3

Worksheet: Solving Subtraction Equations, Worksheet 3

This is part of a collection of math worksheets on the topic of solving subtraction equations.

Subtraction Facts to 25
Worksheet: Solving Subtraction Equations, Worksheet 4

Worksheet: Solving Subtraction Equations, Worksheet 4

Worksheet: Solving Subtraction Equations, Worksheet 4

This is part of a collection of math worksheets on the topic of solving subtraction equations.

Subtraction Facts to 25
Worksheet: Solving Subtraction Equations, Worksheet 5

Worksheet: Solving Subtraction Equations, Worksheet 5

Worksheet: Solving Subtraction Equations, Worksheet 5

This is part of a collection of math worksheets on the topic of solving subtraction equations.

Subtraction Facts to 25
Worksheet: Solving Word Problems with Three Numbers, Worksheet 1

Worksheet: Solving Word Problems with Three Numbers, Worksheet 1

Worksheet: Solving Word Problems with Three Numbers, Worksheet 1

This is part of a collection of math worksheets on the topic of solving word problems.

Addition Facts to 25
Worksheet: Solving Word Problems with Three Numbers, Worksheet 10

Worksheet: Solving Word Problems with Three Numbers, Worksheet 10

Worksheet: Solving Word Problems with Three Numbers, Worksheet 10

This is part of a collection of math worksheets on the topic of solving word problems.

Subtraction Facts to 25
Worksheet: Solving Word Problems with Three Numbers, Worksheet 2

Worksheet: Solving Word Problems with Three Numbers, Worksheet 2

Worksheet: Solving Word Problems with Three Numbers, Worksheet 2

This is part of a collection of math worksheets on the topic of solving word problems.

Addition Facts to 25
Worksheet: Solving Word Problems with Three Numbers, Worksheet 3

Worksheet: Solving Word Problems with Three Numbers, Worksheet 3

Worksheet: Solving Word Problems with Three Numbers, Worksheet 3

This is part of a collection of math worksheets on the topic of solving word problems.

Addition Facts to 25
Worksheet: Solving Word Problems with Three Numbers, Worksheet 4

Worksheet: Solving Word Problems with Three Numbers, Worksheet 4

Worksheet: Solving Word Problems with Three Numbers, Worksheet 4

This is part of a collection of math worksheets on the topic of solving word problems.

Addition Facts to 25
Worksheet: Solving Word Problems with Three Numbers, Worksheet 5

Worksheet: Solving Word Problems with Three Numbers, Worksheet 5

Worksheet: Solving Word Problems with Three Numbers, Worksheet 5

This is part of a collection of math worksheets on the topic of solving word problems.

Addition Facts to 25
Worksheet: Solving Word Problems with Three Numbers, Worksheet 6

Worksheet: Solving Word Problems with Three Numbers, Worksheet 6

Worksheet: Solving Word Problems with Three Numbers, Worksheet 6

This is part of a collection of math worksheets on the topic of solving word problems.

Subtraction Facts to 25
Worksheet: Solving Word Problems with Three Numbers, Worksheet 7

Worksheet: Solving Word Problems with Three Numbers, Worksheet 7

Worksheet: Solving Word Problems with Three Numbers, Worksheet 7

This is part of a collection of math worksheets on the topic of solving word problems.

Subtraction Facts to 25
Worksheet: Solving Word Problems with Three Numbers, Worksheet 8

Worksheet: Solving Word Problems with Three Numbers, Worksheet 8

Worksheet: Solving Word Problems with Three Numbers, Worksheet 8

This is part of a collection of math worksheets on the topic of solving word problems.

Subtraction Facts to 25
Worksheet: Solving Word Problems with Three Numbers, Worksheet 9

Worksheet: Solving Word Problems with Three Numbers, Worksheet 9

Worksheet: Solving Word Problems with Three Numbers, Worksheet 9

This is part of a collection of math worksheets on the topic of solving word problems.

Subtraction Facts to 25
Worksheet: Using Subtraction to Solve, Worksheet 1

Worksheet: Using Subtraction to Solve, Worksheet 1

Worksheet: Using Subtraction to Solve, Worksheet 1

This is part of a collection of math worksheets on the topic of using subtraction to find a missing value.

Subtraction Facts to 25
Worksheet: Using Subtraction to Solve, Worksheet 2

Worksheet: Using Subtraction to Solve, Worksheet 2

Worksheet: Using Subtraction to Solve, Worksheet 2

This is part of a collection of math worksheets on the topic of using subtraction to find a missing value.

Subtraction Facts to 25
Worksheet: Using Subtraction to Solve, Worksheet 3

Worksheet: Using Subtraction to Solve, Worksheet 3

Worksheet: Using Subtraction to Solve, Worksheet 3

This is part of a collection of math worksheets on the topic of using subtraction to find a missing value.

Subtraction Facts to 25
Worksheet: Using Subtraction to Solve, Worksheet 4

Worksheet: Using Subtraction to Solve, Worksheet 4

Worksheet: Using Subtraction to Solve, Worksheet 4

This is part of a collection of math worksheets on the topic of using subtraction to find a missing value.

Subtraction Facts to 25
Worksheet: Using Subtraction to Solve, Worksheet 5

Worksheet: Using Subtraction to Solve, Worksheet 5

Worksheet: Using Subtraction to Solve, Worksheet 5

This is part of a collection of math worksheets on the topic of using subtraction to find a missing value.

Subtraction Facts to 25