GCF/HFC and compound bar charts

Front

What is the GCF (Greatest Common Factor)?

Back

The GCF of two or more numbers is the largest number that divides all of them without leaving a remainder.

Front

How do you find the GCF of two numbers?

Back

To find the GCF, list the factors of each number and identify the largest factor they have in common.

Front

What are factors?

Back

Factors are numbers that can be multiplied together to get another number.

Tags

CCSS.4.OA.B.4

Front

List the factors of 24.

Back

1, 2, 3, 4, 6, 8, 12, 24

Tags

CCSS.4.OA.B.4

Front

What is a composite number?

Back

A composite number is a positive integer that has at least one positive divisor other than one or itself.

Tags

CCSS.4.OA.B.4

Front

Which of the following is not a composite number: 24, 40, 66, 61?

Back

61 is not a composite number; it is a prime number.

Tags

CCSS.4.OA.B.4

Front

What is the HCF (Highest Common Factor)?

Back

The HCF is the same as the GCF; it is the largest factor that two or more numbers share.

Front

Find the HCF of 20 and 10.

Back

The HCF of 20 and 10 is 10.

Front

What is a prime number?

Back

A prime number is a natural number greater than 1 that cannot be formed by multiplying two smaller natural numbers.

Tags

CCSS.4.OA.B.4

Front

Is 27 an odd number?

Back

Yes, 27 is an odd number.