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Intro to Equality (Find a Missing Number)
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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
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Level 1
Find the number that makes the equation true. 7 + ? = 14
Level 2
Find the number that makes the equation true. 2 = 11 – ?
Level 3
Mateo has 8 small toy cars and 5 big toy cars. Trung has 4 small toy cars and 9 big toy cars. Do Mateo and Trung have the same number of toy cars? Show with equations.
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