The model shows the addition expression 18 + 12.

A model containing 3 rows of 6 orange squares and 3 rows of 4 blue squares.

One expression that is equivalent to this sum is

.

The model shows the addition expression 18 + 12.

A model containing 3 rows of 6 orange squares and 3 rows of 4 blue squares.

One expression that is equivalent to this sum is

.

Answer:Step-by-step explanation:Answer:Step-by-step explanation: