Fact Families of 1 and 2

The video introduces the concept of fact families, which are groups of math facts using the same three numbers. It explains how addition and subtraction equations can be formed using these numbers, demonstrating with blocks. The video also introduces the fact triangle as a visual aid and provides examples using different numbers to form fact families. Understanding these relationships helps in solving math problems.

What is a fact family in mathematics?

• A collection of unrelated numbers

• A set of numbers that are only used for addition

• A group of numbers that can be used to create different math facts

• A family of numbers that only includes even numbers

How can the numbers 1, 3, and 4 be used in a fact family?

• Only in addition equations

• In multiplication equations

• In both addition and subtraction equations

• Only in subtraction equations

What is the result of rearranging the numbers 2, 5, and 7 in an addition equation?

• 5 + 2 = 7

• 5 + 7 = 12

• 2 + 5 = 10

• 7 + 2 = 9

What is the purpose of a fact triangle?

• To identify prime numbers

• To solve multiplication problems

• To show the relationship between numbers in a fact family

• To calculate division facts

Which of the following is a correct subtraction fact using the numbers 7, 2, and 5?

• 7 - 5 = 3

• 2 - 5 = -3

• 7 - 2 = 5

• 5 - 2 = 3