Standard #: MAFS.4.OA.1.b (Archived Standard)


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Determine the unknown whole number in an equation relating four whole numbers using comparative relational thinking. For example, solve 76 + 9 = n + 5 for n by arguing that nine is four more than five, so the unknown number must be four greater than 76.


General Information

Subject Area: Mathematics
Grade: 4
Domain-Subdomain: Operations and Algebraic Thinking
Cluster: Use the four operations with whole numbers to solve problems. (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
Date of Last Rating: 08/14
Status: State Board Approved - Archived
Assessed: Yes

Test Item Specifications

    Also assesses: MAFS.4.OA.1a

    Assessment Limits :
    Whole number equations are limited to: 
    • addition and subtraction within 1,000.
    • multiplication of 2-digit by 1-digit or a multiple of 10 by a 1-digit. 
    • division of 2-digit by 1-digit. 

    Variables represented by a letter are allowable.

    Calculator :

    No

    Context :

    Allowable





Related Courses

Course Number1111 Course Title222
5012060: Mathematics - Grade Four (Specifically in versions: 2014 - 2015, 2015 - 2022, 2022 and beyond (current))
7712050: Access Mathematics Grade 4 (Specifically in versions: 2014 - 2015, 2015 - 2018, 2018 - 2022, 2022 and beyond (current))
5012015: Foundational Skills in Mathematics 3-5 (Specifically in versions: 2019 - 2022, 2022 and beyond (current))


Related Resources

Formative Assessments

Name Description
Comparative Relational Thinking in a Multiplication Equation

Students use comparative relational thinking to determine the value of an unknown number.

Comparative Relational Thinking in a Division Equation

Students are asked to use comparative relational thinking to determine the value of an unknown number.

Comparative Relational Thinking in an Addition Equation

Students use comparative relational thinking to determine the value of an unknown number.

Comparative Relational Thinking in a Subtraction Equation

Students use comparative relational thinking to determine the value of an unknown number.

Lesson Plan

Name Description
Is the Equation True and Finding the Missing Number

Students will determine if an equation is true or false based on using comparative relational thinking and knowledge of operations. The students will also determine the unknown number in some equations involving addition. 

Original Student Tutorials

Name Description
Think Fast! Comparative Strategies: Part 3

Learn how to find a missing value when there are subtraction expressions on both sides of an equal sign by using comparative relational thinking and a number line in this interactive tutorial.

This is part 3 in a 3-part series. Click below to open the other tutorials in the series on comparative strategies.

Think Fast! Comparative Strategies: Part 2

Learn how to think fast to find a missing value when there are subtraction expressions on both sides of an equal sign by using using comparative relational thinking and a part-whole board in this interactive tutorial.

This is part 2 in a 3-part series. Click below to open the other tutorials in the series on comparative strategies.

Think Fast: Comparative Strategies: Part 1

Learn how to think fast and compare the parts in addition expressions on different sides of the equal sign to find an unknown number with this interactive tutorial.

Student Resources

Original Student Tutorials

Name Description
Think Fast! Comparative Strategies: Part 3:

Learn how to find a missing value when there are subtraction expressions on both sides of an equal sign by using comparative relational thinking and a number line in this interactive tutorial.

This is part 3 in a 3-part series. Click below to open the other tutorials in the series on comparative strategies.

Think Fast! Comparative Strategies: Part 2:

Learn how to think fast to find a missing value when there are subtraction expressions on both sides of an equal sign by using using comparative relational thinking and a part-whole board in this interactive tutorial.

This is part 2 in a 3-part series. Click below to open the other tutorials in the series on comparative strategies.

Think Fast: Comparative Strategies: Part 1:

Learn how to think fast and compare the parts in addition expressions on different sides of the equal sign to find an unknown number with this interactive tutorial.



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