Understanding Related Facts and Fact Families

This video tutorial explains the concept of related facts and fact families in mathematics. It demonstrates how addition and subtraction facts are related when they use the same numbers in different orders. The tutorial provides examples using gems and numbers to illustrate how to identify missing numbers and create fact families. It also guides viewers on checking if number sentences are related facts, emphasizing the importance of using the same three numbers in different orders.

What is a key characteristic of related facts in addition and subtraction?

• They always result in the same sum.

• They use different numbers in the same order.

• They use the same numbers in different orders.

• They involve multiplication and division.

If you have the numbers 8, 5, and 13, which of the following is a related subtraction fact?

• 5 - 8 = -3

• 8 - 5 = 3

• 13 - 8 = 5

• 13 - 5 = 8

How many addition and subtraction sentences are there in a fact family?

• One addition and one subtraction

• Two addition and one subtraction

• Three addition and two subtraction

• Two addition and two subtraction

Which of the following sets of numbers can form a fact family?

• 8, 9, 17

• 4, 5, 10

• 5, 7, 12

• 3, 6, 9

What is the rule for identifying related facts?

• They must have the same sum.

• They use the same numbers in different orders.

• They must include a zero.

• They must be in ascending order.

Which of the following is NOT a related fact for the numbers 9, 7, and 16?

• 9 + 7 = 16

• 16 - 9 = 7

• 16 - 8 = 8

• 7 + 9 = 16

Why are doubles in addition not always related facts?

• They do not use the same numbers in subtraction.

• They are only used in multiplication.

• They cannot be used in subtraction.

• They always result in an even number.

If you have the numbers 6, 6, and 12, which of the following is a related subtraction fact?

• 12 - 12 = 0

• 6 - 12 = -6

• 6 - 6 = 0

• 12 - 6 = 6

What should you remember when identifying related facts?

• They must include a zero.

• They use the same numbers in different orders.

• They must be in ascending order.

• They always result in an even number.

Which of the following is a related fact for the numbers 9, 2, and 11?

• 11 - 9 = 3

• 9 + 2 = 11

• 11 - 2 = 8

• 2 + 9 = 10