Understanding 10 More and 10 Less

The video tutorial introduces the concept of identifying numbers that are 10 more or 10 less than a given number. It uses relatable examples, such as counting seeds and markers, to explain the concept. The tutorial demonstrates how to model problems using tens and ones blocks and encourages the use of mental math for quick calculations. It also includes interactive elements like a personal math trainer to reinforce learning and provide additional practice.

How many seeds did Sam eat if he ate 10 fewer seeds than the bird who ate 27 seeds?

• 20

• 10

• 37

• 17

If Tony has 34 markers, how many markers does Pat have if he has 10 fewer markers than Tony?

• 24

• 44

• 20

• 34

How many markers does Jan have if she has 10 more markers than Tony, who has 34 markers?

• 54

• 34

• 44

• 24

What is 10 less than 21?

• 10

• 11

• 1

• 31

What is 10 more than 21?

• 31

• 41

• 11

• 21

Margaux has 21 stamps. How many stamps does Chet have if he has 10 more stamps than Margaux?

• 11

• 31

• 41

• 21

If Chet has 31 stamps, how many stamps does Louise have if she has 10 more stamps than Chet?

• 21

• 41

• 31

• 51

What is 10 less than 24?

• 14

• 20

• 34

• 4

What is 10 more than 45?

• 55

• 35

• 75

• 65

What is 10 less than 45?

• 55

• 35

• 15

• 25