Standard #: MAFS.2.MD.2.5 (Archived Standard)


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Use addition and subtraction within 100 to solve word problems involving lengths that are given in the same units, e.g., by using drawings (such as drawings of rulers) and equations with a symbol for the unknown number to represent the problem.


General Information

Subject Area: Mathematics
Grade: 2
Domain-Subdomain: Measurement and Data
Cluster: Relate addition and subtraction to length. (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: 02/14
Status: State Board Approved - Archived

Related Courses

Course Number1111 Course Title222
5012040: Mathematics - Grade Two (Specifically in versions: 2014 - 2015, 2015 - 2022, 2022 and beyond (current))
7712030: Access Mathematics Grade 2 (Specifically in versions: 2014 - 2015, 2015 - 2018, 2018 - 2022, 2022 and beyond (current))
5020090: STEM Lab Grade 2 (Specifically in versions: 2016 - 2022, 2022 and beyond (current))
5012005: Foundational Skills in Mathematics K-2 (Specifically in versions: 2019 - 2022, 2022 and beyond (current))


Related Resources

Formative Assessments

Name Description
Adding Measures

Students are asked to solve problems requiring addition of measures.

Subtracting Measures

Students use subtraction to solve problems requiring subtraction of measures.

Heading Home

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

String For Bracelets

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

Lesson Plans

Name Description
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.

Where to Locate the Bus Stop.

The school principal wishes to locate a bus stop that serves a given set of students living on a road. The criterion for determining the location is to make the sum of distances traveled by all of the student riders as small as possible. The problem is to determine the best location for a given set of students and to determine a general rule.

Original Student Tutorials

Name Description
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.

Racing Riley Adds Lengths

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

Tutorials

Name Description
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.

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.

Student Resources

Original Student Tutorials

Name Description
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.

Racing Riley Adds Lengths:

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

Tutorials

Name Description
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.

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.



Parent Resources

Tutorials

Name Description
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.

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.



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