Understanding Fact Families

What is a fact family?

• A collection of numbers that only form addition sentences

• A pair of numbers that are always equal

• A set of numbers that can form four number sentences

• A group of three unrelated numbers

How many addition and subtraction sentences does a fact family create?

• Two addition and two subtraction sentences

• Three addition and one subtraction sentence

• Four addition sentences only

• One addition and one subtraction sentence

What should you avoid when creating a fact family?

• Using the largest number in subtraction

• Using the same number twice in a sentence

• Creating more than four sentences

• Using numbers that are not part of the family

Where should the largest number be placed in addition sentences?

• Before the equal sign

• After the equal sign

• At the beginning of the sentence

• In the middle of the sentence

In subtraction sentences, where should the largest number be placed?

• It doesn't matter

• In the middle of the sentence

• At the beginning of the sentence

• At the end of the sentence

What is the first step in creating a fact family from a set of numbers?

• Create subtraction sentences first

• Mix and match numbers randomly

• Identify the smallest number

• Identify the largest number

If a fact family consists of the numbers 6, 8, and 2, what is the correct addition sentence?

• 6 + 2 = 8

• 8 + 6 = 2

• 2 + 8 = 6

• 6 + 8 = 2

How can you find a missing number in a fact family?

• By adding all numbers together

• By subtracting the smallest number from the largest

• By using counters or a number line

• By guessing

What should you do if you find a 'stranger number' in a fact family sentence?

• Replace it with zero

• Include it in the family

• Ignore it

• Remove it from the sentence

In a fact family with numbers 10, 15, and 5, which of the following is a correct subtraction sentence?

• 15 - 5 = 10

• 10 - 5 = 15

• 15 - 10 = 5

• 5 - 15 = 10