NC.2.MD.5
Use addition and subtraction, within 100, to solve word problems involving lengths that are given in the same units, using equations with a symbol for the unknown number to represent the problem.
Embedded Files
Step 1: Lesson Standards & Learning Goals
In this standard, students apply their understanding of length (NC.2.MD.1) to solve addition and subtraction word problems (NC.2.OA.1) with numbers within 100. Within a problem, the same unit of measurement should be used. Students are expected to solve word problems related to all of the problem types for addition and subtraction that are described in NC.2.OA.1. Numbers should be limited to 100 or less. Students are expected to use symbols to represent unknowns in all positions in equations in this standard. Equations may vary depending on students’ interpretation of the task. Students should use the multiple place value strategies and representations described in NC.2.NBT.5.
Sample Essential Questions
Sample Essential Questions
How do you use addition and subtraction to solve measurement problems?
What are some strategies to solve word problems using measurement units of length?
How can number line diagrams be helpful in adding and subtracting numbers?
Vocabulary
Vocabulary
add
centimeter (cm)
difference
equation
foot/feet (ft)
inch (in)
length
meter (m)
subtract
sum
unknown number
yard (yd)
Students will be able to...
Students will be able to...
Apply their understanding of length to solve addition and subtraction word problems with numbers within 100.
Students should use the multiple place value strategies and representations described in NC.2.NBT.5.
Use concrete models to make sense of a word problem and solve it
Use pictures to make sense of a word problem and solve it
Write an equation with a symbol for the unknown in the problem.
Explain how the problem was solved.
Students will know...
Students will know...
Measurement in the same unit like inches can be added or subtracted in the same way as adding and subtracting whole numbers.
The measurement unit needs to be written with the sum or difference.
Numbers lines can help students add and subtract.
A ruler, meter stick, yard stick, and tape measure are all types of number lines used for measurement.
Measurement is a skill needed to solve real world problems.
Step 2: Assessment
Mastery Connect
Mastery Connect
NC.2.MD.5 - CO - Howell - Jan. 23, 2023
NC.2 - Cluster 6 Review - CO - Howell - Feb. 17, 2023
NCDPI Assessments
Grade 2 Math Assessment Practice Prompts
Step 3: Lesson Instructions
Possible Activating Strategies
Possible Activating Strategies
Experience or Exploration
Measurement Scavenger Hunt
Take students on a measurement scavenger hunt around the classroom or school. Provide them with a list of items to measure using rulers or measuring tapes, and have them record the lengths of each item in inches or centimeters. Afterwards, they can create addition and subtraction word problems based on their measurements.
Video Clip
Understand, Plan, Solve, Check Strategy
Teacher Resources
Teacher Resources
Tools 4 NC Teachers
Cluster 6 Lessons
Math Expressions - (Barnes and Hearne) - Standards Alignment
Motivation Math
Think Up! Math
Khan Academy - 2nd Grade Math
Eureka Math/Engage NY Free Resources
Embarc Online (Eureka Math) -
Zearn Math - Online Support Practice for Eureka Math (Requires free account)
North Carolina Collaborative for Mathematics Learning - Grade 2 Instructional Framework
NCDPI Resources
Grade 2 Math Assessment Practice Prompts
Grade 2 Released Summative Assessments
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