MAFS.2.MD.2.6 Represent whole numbers as lengths from 0 on a number line diagram with equally spaced points corresponding to the numbers 0, 1, 2, …, and represent whole-number sums and differences within 100 on a number line diagram.
Cognitive Complexity Level: 1-Recall
[divider] [/divider] Students are able to…
- Represent whole numbers as lengths.
- Use a number line diagram to represent measurement lengths.
- Use the measurement lengths on a line diagram to solve problems involving addition and subtraction.
[divider] [/divider] Students are able to…because teachers:
- Providing problem solving scenarios for students to solve involving measurement length.
- Encouraging the use of number line diagrams to represent and solve the story problems.
[divider] [/divider] Questions to ask students:
- Ask: How does the number line diagram represent the story problem?
- Sample answer that indicates understanding: Students should be able to describe the representation and relate it back to the story problem.
- Ask: How did you know to add/subtract?
- Sample answer that indicates understanding: The actions in the problem told me to add because we were physical combining two lengths.
[divider] [/divider] Additional Resources:
Additional in depth content knowledge
[divider] [/divider] Sample Formative Assessment Tasks:
CPALMS formative assessment task: Representing Numbers with Length
[divider] [/divider] Resources/Tasks to Support Your Child at Home:
- Relate a number line to a ruler. Have your child compare and contrast the two tools.
- Have your child practice creating a number line from 0-20. Then encourage them to plot points that would be located on the number line.
- Khan Academy Practice: Add and Subtract on a Number Line