Add and Subtract Using Fact Families

The video tutorial introduces the concept of fact families, demonstrating how addition and subtraction are related. It reviews the commutative property of addition and addresses common misconceptions about subtraction. Through various examples, the tutorial explains how knowing one fact in a family can help deduce others, reinforcing the interconnectedness of these operations. The lesson concludes with advanced examples and a summary of the key points covered.

Which of the following statements is true about addition?

• Addition can be done in any order.

• Addition always results in a smaller number.

• Addition is the same as subtraction.

• Addition can only be done in one specific order.

If 5 plus 4 equals 9, what is 9 minus 4?

• 5

• 4

• 9

• 1

What is a fact family?

• A group of numbers that can only be subtracted.

• A group of numbers that can only be added.

• A set of related addition and subtraction facts.

• A family that loves math.

If 8 plus 9 equals 17, what is 17 minus 9?

• 1

• 17

• 9

• 8

Which of the following is a correct subtraction fact from the family of 6 plus 3 equals 9?

• 6 minus 3 equals 9

• 3 minus 6 equals 9

• 9 minus 3 equals 6

• 9 minus 6 equals 4