1. Clare builds an array with 16 counters. She says, “The array has only 2 columns, and it’s really long.”

   How many counters are in each column?

2. Build a different array with 16 counters. Describe your array.

1. Circle the 2 expressions that represent the array.

   

   \(7 + 7 + 7 + 7 + 7 + 7 + 7\)

   \(7 + 7\)

   \(2 + 2 + 2 + 2 + 2 + 2 + 2\)

   \(2 + 2\)

2. How many counters are in the array?

1. Make an array with 15 counters.

2. Write 2 equations with equal addends to show the total number of counters.

1. Partition this rectangle into equal-size squares.

   

2. How many columns of squares are there?

   How many squares are in each column?

3. How many rows of squares are there?

   How many squares are in each row?

4. Write 2 equations to represent the number of squares in the array.

1. Partition the rectangle into equal-size squares.

   

2. Write 2 equations to represent the number of squares in the array.

Solar panels collect energy from the sun. Look at these solar panels. They have different arrays.

1. Describe some arrays you see in the panels. How many equal-size rectangles are in each array?

2. Write an equation for the number of equal-size rectangles in each array.

1. What are some things in your classroom or at home that come in arrays?
2. Choose 1 of the arrays. Find the number of rows and columns. Then find the total number of objects.