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## Kindergarten

### Unit 1: Lesson 4

Comparing small numbers

# Comparing numbers on the number line

Sal uses number line to compare numbers less than or equal to 10. Created by Sal Khan.

## Want to join the conversation?

• Can the number line be extended?
• It could be extended forever.
• What happen when they use negative number like:
What is greater than -2 ?
a. 2
b. -1
c. 0
d. -3
What will be the answer if this was one of the problems?
• If that was a question the correct answers would be a, b and c.
Since: -2 < -1 < 0 < 2.
• What are negative numbers?
• Negative numbers are numbers that go below 0!
for example, this is how they would look on a number line.
-5 -4 -3 -2 -1 0 1 2 3 4 5
(1 vote)
• Is greater then always to the right of the number and less then always to the left of the number?
• do comparing numbers help us ?
• Yes as Barrett Southworth said you will use this well into your adult life. I'm in high school and still use it today. ;-)
• why after every question we have a video to watch ?
• I really need help on division can I get a video
• Yes you can. Try searching division at the top of your screen
• When doing mental math do most of you visualize a number line or use a different technique?
• When doing mental math, I often break the numbers into parts. For example, when I add `82 + 123`, I would break it into parts: `100 + 80 + 20 + 3 + 2`. Sometimes I mentally simplify the equation too; once I break it into parts, I add some of them together, to simplifying it to `100 + 100 + 5`. Once completing the equation, the answer would be `205`.