Hope you enjoyed the video!
Thanks for watching!
You have remaining on your free trial.
4 Free Lessons Left
Get unlimited access to all videos and lesson plans with a membership.
So you can keep watching more great videos in class, ask your teacher or principal to get a School plan membership.
We hope you enjoyed trying 5 lessons!
Become a member to get full access to our entire library of learning videos, reading material, quiz games, simple DIY activities & more.
Become a member to get full access to our entire library of learning videos, quiz games, & more.
Plans & PricingWe now offer home science kits so you can do fun experiments at home.
Explore the KitCreate a free account to continue watching
Welcome to Our New Math Lessons!
Your subscription is currently only to our science lessons.
5 Free Math Lessons Left
Add Math To My Plan (+$50/yr)We hope you enjoyed sampling 5 Math Lessons!
Your subscription is currently only to our science lessons.
Add Math To My Plan (+$50/yr)0 Free Math Lessons Left
Create a free account
to watch this full video.
* no credit card needed *
Try it Free Continue with previewCreate a free account
to watch this full video.
Start your free trial!
Access All Videos
and Lessons, No Limits.
Access All Videos
No credit card required,
takes 7 sec to signup.
No card required
Ready-to-go lessons
that save you time.
Ready-to-go lessons
Oops! It looks like your security settings are blocking this video 🙁
If you are on a school computer or network, ask your tech person to whitelist these URLs:
*.wistia.com, fast.wistia.com, fast.wistia.net, embedwistia-a.akamaihd.net
Sometimes a simple refresh solves this issue. If you need further help, contact us.
Create a free account to unlock all content!
Get Full AccessNEW! Bring the Fun Home with Our Epic Science Kits
Explore The KitsIntro to Negative Numbers
Sorry, student links are only for classroom & school accounts.
Please login to generate a student link.
Generate Student Link
- Show lesson plan & teacher guide
- Show answers to discussion questions
- Show video only
- Allow visiting of other pages
- Hide assessments
What you will learn from this videoWhat you will learn
- We’ll learn that positive numbers are greater than zero and negative numbers are less than zero.
- That opposite numbers are the same distance from zero, but on opposite sides of a number line.
- And we'll see that this knowledge can help us understand the weather, pay for things, and explore the globe.
- Discussion Questions
Before Video
Which temperature is better for going swimming: 0°C or 34°C? How do you know?ANSWER34°C, because it is warmer. 0°C is too cold.
Draw tick marks near the middle for 0 and to the right for 34, then put a dot on each one.
Draw a horizontal line with the numbers 15 through 20 from left to right, or a vertical line with the numbers 15 through 20 from bottom to top. Draw and label tick marks for each number.
15°C is 5°C cooler, because it is farther left (or lower) on a number line.
1°C; 0°C
After Video
What does the greater than symbol look like? How is it different from the less than symbol?ANSWERGreater than opens to the left (>), and less than opens to the right (<).
Both numbers are the same distance from zero, in opposite directions.
The second equation is true, because –3 is 3 units away from zero. The first equation cannot be true, because absolute values are never negative.
–12 is greater, because it is farther to the right on a number line. It is closer to zero on the negative side of the number line.
–6 < –1 < 0 < |2| < |–4|
- Vocabulary
- Positive number DEFINE
A number that is greater than zero.
- Negative number DEFINE
A number that is less than zero.
- Compare DEFINE
When you compare two numbers, you decide which number is greater and which is lesser.
- Number line DEFINE
A line, usually horizontal or vertical, with numbers placed in their correct position.
- Opposite numbers DEFINE
Two numbers that are the same distance from zero on opposite sites.
- Absolute value DEFINE
How far a number is from zero (i.e. magnitude without direction).
- Positive number DEFINE
- Reading Material
- Practice Word Problems
- Practice Number Problems
- Lesson Plan
- Teacher Guide