## NY-1.OA.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 = _.

There are 42 resources.
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## Test Prep Interactive Quizzes

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

## Math Worksheet Collection: The Language of Math

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 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.

## 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 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 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 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

## Worksheet: Fact Families

### Worksheet: Fact Families Given a fact family, complete the equations.

Addition Expressions and Equations and Subtraction Expressions and Equations

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

Subtraction Facts to 25