Question

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 1

To find an expression equivalent to the sum \( 18 + 12 \), we can break down the components shown in the model.

You have:
- 3 rows of 6 orange squares: \( 3 \times 6 = 18 \)
- 3 rows of 4 blue squares: \( 3 \times 4 = 12 \)

From this, we can express the total as:
\[
18 + 12 = (3 \times 6) + (3 \times 4)
\]

This means one expression that is equivalent to \( 18 + 12 \) is:
\[
(3 \times 6) + (3 \times 4)
\]

You can also express this as:
\[
3 \times (6 + 4)
\]

Thus, another equivalent expression could be:
\[
3 \times 10
\]

So, both \( (3 \times 6) + (3 \times 4) \) and \( 3 \times (6 + 4) \) are correct answers, and specifically, the answer to fill in would be:
\[
3 \times (6 + 4)
\]