Determining the Unknown

Front

What is a fact family?

Back

A fact family is a group of related math facts that use the same numbers. For example, the fact family for 4 x 6 = 24 includes 4, 6, and 24.

Front

What is the unknown in the equation 27 ÷ ___ = 9?

Back

The unknown is 3.

Front

How do you find the unknown in a multiplication equation like p x 10 = 90?

Back

To find p, divide 90 by 10. So, p = 9.

Front

What is the process to solve for an unknown in division?

Back

To solve for an unknown in division, you can multiply the result by the divisor. For example, if 27 ÷ x = 9, then x = 27 ÷ 9 = 3.

Front

What does it mean to solve for an unknown?

Back

Solving for an unknown means finding the value of a variable that makes an equation true.

Front

What is the unknown in the equation m x 6 = 36?

Back

The unknown m is 6.

Front

What is the relationship between multiplication and division?

Back

Multiplication and division are inverse operations. If you know one, you can find the other.

Front

If 4 x 6 = 24, what are the other equations in the fact family?

Back

The other equations are 6 x 4 = 24, 24 ÷ 4 = 6, and 24 ÷ 6 = 4.

Front

How can you check your answer when solving for an unknown?

Back

You can check your answer by substituting the unknown back into the original equation to see if it holds true.

Front

What is the value of p in the equation p x 10 = 90?

Back

The value of p is 9.