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:
Core Math Resources, Lesson Plans & Worksheets for all grades
Common Core Math
Video Lessons, Math Worksheets and Games for Grade 2
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
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.
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