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Lengths using Number Lines


Videos and solutions to help Grade 2 students learn how to represent two-digit sums and differences involving length by using the ruler as a number line.

Common Core Standards: 2.MD.5, 2.MD.6, 2.NBT.2, 2.NBT.4, 2.NBT.5

Related Topics:
Common Core Math Resources, Lesson Plans & Worksheets for all grades

Common Core Math Video Lessons, Math Worksheets and Games for Grade 2

Common Core Math Video Lessons, Math Worksheets and Games for all grades

New York State Common Core Math Module 7, Grade 2, Lesson 22

Topic E: Problem Solving with Customary and Metric Units

NYS Math Grade 2 Module 7 Lesson 22

Lesson 22 Homework

1. Each unit length on both number lines is 10 centimeters.
(Note: Number lines not drawn to scale
a. Show 20 centimeters more than 35 centimeters on the number line.
c. Write an addition sentence to match each number line.
3. Laura’s meter strip got cut off at 37 centimeters. To measure the length of her screwdriver, she writes “51 cm – 37 cm.” Tam says it’s easier to move the screwdriver over 3 centimeters. What is Tam’s subtraction sentence? Explain why she’s correct.
4. Alice measured her belt to be 22 inches long using a yardstick, but she didn’t start her measurement at zero. What might be the two endpoints of her belt on her meter stick? Write a subtraction sentence to match your idea.

Rotate to landscape screen format on a mobile phone or small tablet to use the Mathway widget, a free math problem solver that answers your questions with step-by-step explanations.

You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.

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