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.
Plans & PricingCreate a free account to continue watching
Already a member? Sign In
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
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.
Intro to Equality (Find a Missing Number)
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
- The equal sign tells us that the amount on both sides of it are the same.
- Understanding the equal sign can help us find a missing number in an equation.
- This knowledge can help us play drums, have a bake sale and even smash open a piñata!
- Discussion Questions
Before Video
There are 3 green balls and 2 blue balls. Use counters to compare the number of balls. Draw a picture.ANSWERThe number of green balls is greater than the number of blue balls (3 > 2), or the number of blue balls is less than the number of green balls (2 < 3).
The number of blue balls is the same as the number of orange balls (6 = 6).
The number of green balls and the number of blue balls is the same (5 = 5)
The number of red balls is greater than the number of yellow balls (9 > 4), or the number of yellow balls is less than the number of red balls (4 < 9).
The number of red balls and the number of blue balls is the same (12 = 12).
After Video
Write an equation to show that 4 + 9 books are the same as 13 books.ANSWER4 + 9 = 13.
9, 8 + 9 = 17.
8; 6 = 14 – 8
7; 7 – 3 = 4
Nancy has 6 + 7, or 13 apples. Padma has 9 + 4, or 13 apples. 6 + 7 = 13 and 9 + 4 = 6 + 7 and 13 = 13. Nancy and Padma each have 13 apples.
- Vocabulary
- Equal sign DEFINE
Means that the amounts on both sides of it are the same.
- Equation DEFINE
Says that two things are equal. 6 + 3 = 9.
- Total DEFINE
The whole amount.
- True equation DEFINE
Values on each side of the equal sign are the same.
- False equation DEFINE
Values on each side of the equal sign are not the same.
- Equal DEFINE
Exactly the same amount or value.
- Unknown Amount DEFINE
An equation may show that one part is unknown. You may see it as ____ or ?, for example, 3 + ? = 10.
- Equal sign DEFINE
- Reading Material
- Practice Word Problems
- Practice Number Problems
- Lesson Plan
- Teacher Guide
Explore Our Science Topics
Explore Our Science Topics
Select a Google Form
Choose a way to play this quiz game
- Questions appear on the teacher's screen. Students answer on their own devices.