Understanding Arrays and Equations

What is an array in the context of mathematics?

• A single number

• A model representing quantities using columns and rows

• A mathematical operation

• A type of equation

How can you represent an array with three rows of four pieces each using an equation?

• 4 + 4 + 4 = 12

• 3 + 3 + 3 = 9

• 2 + 2 + 2 = 6

• 5 + 5 + 5 = 15

What equation represents an array with three groups of three pieces each?

• 2 + 2 + 2 = 6

• 4 + 4 + 4 = 12

• 3 + 3 = 6

• 3 + 3 + 3 = 9