Standard #: MAFS.1.OA.4.7 (Archived Standard)


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Understand the meaning of the equal sign, and determine if equations involving addition and subtraction are true or false. For example, which of the following equations are true and which are false? 6 = 6, 7 = 8 – 1, 5 + 2 = 2 + 5, 4 + 1 = 5 + 2.


General Information

Subject Area: Mathematics
Grade: 1
Domain-Subdomain: Operations and Algebraic Thinking
Cluster: Work with addition and subtraction equations. (Major Cluster) -

Clusters should not be sorted from Major to Supporting and then taught in that order. To do so would strip the coherence of the mathematical ideas and miss the opportunity to enhance the major work of the grade with the supporting clusters.

Date Adopted or Revised: 02/14
Content Complexity Rating: Level 2: Basic Application of Skills & Concepts - More Information
Date of Last Rating: 02/14
Status: State Board Approved - Archived

Related Courses

Course Number1111 Course Title222
5012030: Grade One Mathematics (Specifically in versions: 2014 - 2015, 2015 - 2022, 2022 - 2024, 2024 and beyond (current))
7712020: Access Mathematics Grade 1 (Specifically in versions: 2014 - 2015, 2015 - 2018, 2018 - 2022, 2022 and beyond (current))
5012005: Foundational Skills in Mathematics K-2 (Specifically in versions: 2019 - 2022, 2022 - 2024, 2024 and beyond (current))


Related Resources

Formative Assessments

Name Description
Is the Equation True or False?

Students are given sets of equations and asked to circle the equations that are true.

More True and False Equations

Students are given a set of equations and asked to circle the equations that are true.

True or Not True

Students examine four equations and state if they are true or not true. Students must also justify their reasoning.

Equality

Students are asked to justify why two equations are true using two different strategies.

Equal or Not Equal

The student determines if a given equation is true or false.

Lesson Plans

Name Description
Show It Another Way

In this lesson, students will apply properties of addition in order to add three whole numbers. Students will then decompose the sum using tens and ones.

Make Mine Equal

Students will explore the meaning of the equal sign by creating and completing equations that have two addends on each side of the equation. Note that this lesson focuses on addition equations, though it can easily be adapted to include subtraction equations.

Weigh your options!

Students will explore the meaning of the equal sign by representing an equation with manipulatives on a scale. The students will be asked to decide if an addition or subtraction equation is true or false by proving it with and without a scale. Students will determine the missing number in addition or subtraction equations.

Balancing Equations

This is an engaging, hands-on lesson to help the students understand the meaning of the equal sign. The lesson is written using a pan/equal arm balance but may be done with just connecting cubes.

Understanding the Equal Sign

This lesson helps students to understand the meaning of the equal sign and to realize that one side of an equation must equal (balance) the other side of the equation.

Dangerous Doubles (Doubling Numbers)

This lesson teaches students to use the strategy doubling numbers and doubles plus or minus one in order to use mental math to add one-digit numbers. The students are engaged in learning through the read-aloud of "Double the Ducks" by Stephen Murphy and then get to work with a partner to draw doubles and write equations that relate to their drawings. Students individually work on solving word problems using these strategies and manipulatives as necessary to solve.

True or False?

In this lesson, students will explore true and false addition and subtraction equations through a variety of hands-on learning activities. Detailed center ideas are also covered in this lesson.

Original Student Tutorial

Name Description
Teams with the Same Amount

Learn how to tell whether an equation is true or false based on what you know about the equal sign as you complete this interactive tutorial.

Problem-Solving Tasks

Name Description
Equality Number Sentences

The purpose of this instructional task is for students to help students understand the meaning of the equal sign and to use it appropriately. The idea is that students should be comparing the number of circles in each of the rectangles and to write an equation that reflects the fact there are an equal number in each of the boxes (when this is the case).

Valid Equalities?

The purpose of this task is to help broaden and deepen students' understanding of the equals sign and equality. This task helps students attend to precision by helping them explicitly attend to the meaning of mathematical notation and carefully analyze whether it is being used correctly.

Using lengths to represent equality

The act of trying to find equal lengths with the rods helps students develop a physical understanding for the meaning of equality. Students are more likely to generate and understand complex equalities than they would be able to do only abstractly.

Virtual Manipulative

Name Description
Pan Balance - Numbers

This tool helps students better understand that equality is a relationship and not an operational command to "find the answer." The applet features a pan balance that allows the student to input each half of an equation in the pans, which responds to the numerical expression's value by raising, lowering or balancing.

Student Resources

Original Student Tutorial

Name Description
Teams with the Same Amount:

Learn how to tell whether an equation is true or false based on what you know about the equal sign as you complete this interactive tutorial.

Problem-Solving Tasks

Name Description
Equality Number Sentences:

The purpose of this instructional task is for students to help students understand the meaning of the equal sign and to use it appropriately. The idea is that students should be comparing the number of circles in each of the rectangles and to write an equation that reflects the fact there are an equal number in each of the boxes (when this is the case).

Valid Equalities?:

The purpose of this task is to help broaden and deepen students' understanding of the equals sign and equality. This task helps students attend to precision by helping them explicitly attend to the meaning of mathematical notation and carefully analyze whether it is being used correctly.

Virtual Manipulative

Name Description
Pan Balance - Numbers:

This tool helps students better understand that equality is a relationship and not an operational command to "find the answer." The applet features a pan balance that allows the student to input each half of an equation in the pans, which responds to the numerical expression's value by raising, lowering or balancing.



Parent Resources

Problem-Solving Tasks

Name Description
Equality Number Sentences:

The purpose of this instructional task is for students to help students understand the meaning of the equal sign and to use it appropriately. The idea is that students should be comparing the number of circles in each of the rectangles and to write an equation that reflects the fact there are an equal number in each of the boxes (when this is the case).

Valid Equalities?:

The purpose of this task is to help broaden and deepen students' understanding of the equals sign and equality. This task helps students attend to precision by helping them explicitly attend to the meaning of mathematical notation and carefully analyze whether it is being used correctly.

Using lengths to represent equality:

The act of trying to find equal lengths with the rods helps students develop a physical understanding for the meaning of equality. Students are more likely to generate and understand complex equalities than they would be able to do only abstractly.



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