Cluster 2: Relate addition and subtraction to length. (Major Cluster)Archived

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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.

General Information
Number: MAFS.2.MD.2
Title: Relate addition and subtraction to length. (Major Cluster)
Type: Cluster
Subject: Mathematics - Archived
Grade: 2
Domain-Subdomain: Measurement and Data

Related Standards

This cluster includes the following benchmarks.

Related Access Points

This cluster includes the following access points.

Access Points

MAFS.2.MD.2.AP.5a
Solve addition and subtraction word problems involving the difference in standard length units.
MAFS.2.MD.2.AP.6a
Use number lines to solve addition or subtraction problems up to 100.

Related Resources

Vetted resources educators can use to teach the concepts and skills in this topic.

Formative Assessments

Adding Measures:

Students are asked to solve problems requiring addition of measures.

Type: Formative Assessment

Subtracting Measures:

Students use subtraction to solve problems requiring subtraction of measures.

Type: Formative Assessment

Representing Numbers with Length:

Students are asked to find a number that was represented by a length on an incomplete number line.

Type: Formative Assessment

Representing Nine on the Number Line:

Students are asked to scale a number line and use it to draw a segment of length nine.

Type: Formative Assessment

Heading Home:

Students determine the distance walked by a student on her way home from her friend's house.

Type: Formative Assessment

String For Bracelets:

Students are asked to write an equation for and solve a Compare (Difference Unknown) problem in a measurement context.

Type: Formative Assessment

Differences on a Number Line:

Students use a number line to find to the difference between 17 and 42.

Type: Formative Assessment

Sums on a Number Line:

Students use a number line to add 23 and 19 and to find a segment whose length is the sum of 23 and 19.

Type: Formative Assessment

Lesson Plans

Wilbur's Pig Pen Addition:

Students will explore the fundamentals of adding measurements involving shapes. Students will practice measuring the sides of rectangles and engage in an extended problem-solving task that includes adding to find the distance around rectangles.

Type: Lesson Plan

Get Up and Go! with Addition and Subtraction:

The lesson involves students adding and subtracting on a number line while follwoing a story that explains the amount of time taken to get ready in the morning. Students will write addition and subtraction equations to represent the parts of the story.

Type: Lesson Plan

Original Student Tutorials

Construction Measurement Mix-Up:

Add and subtract within 100 to solve word problems involving lengths in the same units to fix the construction mix-up at a school in this interactive tutorial.

Type: Original Student Tutorial

Racing Riley Adds Lengths:

Learn different strategies for adding two-digit numbers and solve problems involving lengths as you complete this interactive tutorial.

Type: Original Student Tutorial

Tutorials

Solving word problems within 100:

This Khan Academy tutorial, called, "sports on a die" explains the pitfalls of relying on key words in a word problem. Students solve a problem by writing a missing addend addition equation and solve with the standard algorithm for subtracting two digit numbers.

Type: Tutorial

Subtracting within 100 using the standard algorithm:

In this tutorial video from Khan Academy, called "Using crayons", explore subtracting within 100 using the standard algorithm, as well as a bar diagram.

Type: Tutorial

Student Resources

Vetted resources students can use to learn the concepts and skills in this topic.

Original Student Tutorials

Construction Measurement Mix-Up:

Add and subtract within 100 to solve word problems involving lengths in the same units to fix the construction mix-up at a school in this interactive tutorial.

Type: Original Student Tutorial

Racing Riley Adds Lengths:

Learn different strategies for adding two-digit numbers and solve problems involving lengths as you complete this interactive tutorial.

Type: Original Student Tutorial

Tutorials

Solving word problems within 100:

This Khan Academy tutorial, called, "sports on a die" explains the pitfalls of relying on key words in a word problem. Students solve a problem by writing a missing addend addition equation and solve with the standard algorithm for subtracting two digit numbers.

Type: Tutorial

Subtracting within 100 using the standard algorithm:

In this tutorial video from Khan Academy, called "Using crayons", explore subtracting within 100 using the standard algorithm, as well as a bar diagram.

Type: Tutorial

Parent Resources

Vetted resources caregivers can use to help students learn the concepts and skills in this topic.

Tutorials

Solving word problems within 100:

This Khan Academy tutorial, called, "sports on a die" explains the pitfalls of relying on key words in a word problem. Students solve a problem by writing a missing addend addition equation and solve with the standard algorithm for subtracting two digit numbers.

Type: Tutorial

Subtracting within 100 using the standard algorithm:

In this tutorial video from Khan Academy, called "Using crayons", explore subtracting within 100 using the standard algorithm, as well as a bar diagram.

Type: Tutorial