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Solve one- and two-step real-world measurement problems involving addition and subtraction of lengths given in the same units.
Examples
Jeff and Larry are making a rope swing. Jeff has a rope that is 48 inches long. Larry’s rope is 9 inches shorter than Jeff’s. How much rope do they have together to make the rope swing?Clarifications
Clarification 1: Addition and subtraction problems are limited to sums within 100 and related differences.General Information
Subject Area: Mathematics (B.E.S.T.)
Grade: 2
Strand: Measurement
Date Adopted or Revised: 08/20
Status: State Board Approved
Benchmark Instructional Guide
Connecting Benchmarks/Horizontal Alignment
Terms from the K-12 Glossary
- NA
Vertical Alignment
Previous Benchmarks
Next Benchmarks
Purpose and Instructional Strategies
The purpose of this benchmark is to incorporate the concept of measurement when solving real- world problems.- Instruction includes the use of inches, feet, yards, centimeters or meters as appropriate measurement units.
- Instruction includes the use of drawing, manipulatives and number lines to solve problems.
Common Misconceptions or Errors
- Students may regroup numbers incorrectly or unnecessarily when subtracting.
- Students may incorrectly decide to add or when to subtract based on the context of the problem.
Strategies to Support Tiered Instruction
- Instruction includes modeling the problem with materials that represent the single length units being considered in the problem, such as 1-inch square tiles or 1-inch grid paper, and 1-cm. unit cubes or 1-cm. grid paper and requiring students to specify the unit of measure after they state a number.
- For example, students can act out what is happening in the word problem with the materials to make connections between measurement situations that involve adding or subtracting.
- Teacher encourages students to utilize strategies that make the most sense for the numbers in the problem, such as “think addition or adding up.”
- Students are guided to connect the idea of length units and numbers represented on a number line.
- Questions or statements that can help elicit student thinking about measurement problems:
- “What unit of measurement do you notice in the problem?”
- “Let’s pick a unit of measure that best fits this problem.”
- “How can we show how the length changed?”
- “What operation best represents what is happening to the units?”
- For example, students can act out what is happening in the word problem with the materials to make connections between measurement situations that involve adding or subtracting.
Instructional Tasks
Instructional Task 1 (MTR.7.1)
Kim and Erin measured the length of their left legs from the knee down. Kim’s leg length measured 48 centimeters. Erin’s leg length measured 15 centimeters more than Kim’s. What is the total length of both Erin’s and Kim’s left legs?
Instructional Items
Instructional Item 1
Ester had 83 inches of ribbon. She used 25 inches to wrap a gift for her brother and 37 inches to wrap a gift for her sister. How much ribbon does she have left over?
Instructional Item 2
In a 100-meter swim, Katie has swum 47 meters. How many more meters does she have to swim?*The strategies, tasks and items included in the B1G-M are examples and should not be considered comprehensive.
Related Courses
This benchmark is part of these courses.
5012040: Grade Two Mathematics (Specifically in versions: 2014 - 2015, 2015 - 2022, 2022 - 2024, 2024 and beyond (current))
7712030: Access Mathematics Grade 2 (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 Access Points
Alternate version of this benchmark for students with significant cognitive disabilities.
MA.2.M.1.AP.3: Solve one-step real-world measurement problems involving addition and subtraction of lengths within 20 given in the same unit (i.e., inch, foot, yard).
Related Resources
Vetted resources educators can use to teach the concepts and skills in this benchmark.
Formative Assessments
Lesson Plan
Original Student Tutorials
MFAS Formative Assessments
String For Bracelets:
Students are asked to write an equation for and solve a Compare (Difference Unknown) problem in a measurement context.
Original Student Tutorials Mathematics - Grades K-5
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.
Student Resources
Vetted resources students can use to learn the concepts and skills in this benchmark.
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
Parent Resources
Vetted resources caregivers can use to help students learn the concepts and skills in this benchmark.
