Unit 4, Lesson 5
Estimate on a Number Line
Grade 2
Warm-up
What number could this be?
- Record an estimate that is:
too low about right too high - Record an estimate that is:
too low about right too high
Activity 1
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What number could this be? ____________
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What number could this be? ____________
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What number could this be? ____________
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What number could this be? ____________
Student Section Summary
We learned that number lines are diagrams that represent numbers as lengths away from 0 along a straight line.
- There are equal-size spaces between dots or tick marks.
- Each dot or tick mark represents a number.
- Number lines show how close or how far numbers are from 0 and each other.
We represented numbers with tick marks and points on number lines. We learned that values go up when moving to the right. We counted by 5 and 10 on number lines to locate and label numbers. We also estimated numbers by thinking about how close they were to 0 and other numbers.