Number Families

The video tutorial introduces the concept of number families using a shopping scenario. It explains how a group of three numbers can form a number family if the sum of the two smaller numbers equals the largest number. The tutorial provides examples using price tags and demonstrates both addition and subtraction facts. It also shows how to identify groups that do not form number families.

What is the largest number in the group of numbers 2, 5, and 3?

• 2

• 3

• None of these

• 5

In a number family, what is the result of adding the two smaller numbers 2 and 3?

• 4

• 5

• 6

• 7

Which of the following is a correct subtraction fact for the number family 4, 2, and 6?

• 2 - 6 = 4

• 4 - 2 = 6

• 6 - 2 = 5

• 6 - 4 = 2

What is the sum of the two smaller numbers in the number family 4, 2, and 6?

• 7

• 6

• 5

• 4

Which of the following groups of numbers forms a number family?

• 1, 5, 2

• 4, 2, 6

• 3, 3, 6

• 2, 2, 4

Why do the numbers 1, 5, and 2 not form a number family?

• The numbers are not even

• The sum of the two smaller numbers is not equal to the largest number

• The largest number is not the sum of the two smaller numbers

• The numbers are not consecutive

What is the result of subtracting 2 from 5 in the group 1, 5, and 2?

• 1

• 2

• 3

• 4