Identify multiplication expressions for equal groups

Understanding Equal Groups

  • Equal Groups: When objects are divided into groups with the same number of items in each group.
  • Example: If you have 3 groups of 4 apples, each group contains the same number of apples (4).

Multiplication as Repeated Addition

  • Multiplication is a faster way to represent repeated addition.
  • Example: 3 groups of 4 apples can be written as 4 + 4 + 4, which is the same as 3 × 4.

Identifying Multiplication Expressions

To identify multiplication expressions for equal groups, determine:

  • The number of groups (how many groups there are).
  • The number in each group (how many items are in each group).

Example: 5 groups of 2 pencils each is written as 5 × 2.

Using Arrays to Model Multiplication

  • Arrays are a visual representation of multiplication.
  • Rows represent groups, and columns represent items in each group.
  • Example: A 3 × 4 array has 3 rows of 4, showing 3 × 4 = 12.

Learn with an example

Which expression describes the model?

  • 2 x 2
  • 2 x 4

The model has 2 groups of dots.

There are 2 dots in each group.

There are 2 groups of 2 dots. The expression that describes the model is:

Which expression describes the model?

  • 3 x 4
  • 3 x 3

The model has 3 groups of dots.

There are 3 groups of 3 dots. The expression that describes the model is:

Which expression describes the model?

  • 4 x 2
  • 2 x 3

The model has 2 groups of dots.

There are 3 dots in each group.

There are 2 groups of 3 dots. The expression that describes the model is:

Let’s practice!