Final Answer:
There are 84 brownies in the tray.
Step-by-step explanation:
Considering there are 12 rows with 7 brownies in each row, you can visualize this as a grid or array. Draw 12 rows with 7 brownies in each row to represent Mrs. Wang's tray of brownies. To find the total number of brownies, use the equation: Total number of brownies = Number of rows × Number of brownies in each row. In this case, 12 rows multiplied by 7 brownies in each row equals 84 brownies in total.
This representation showcases the multiplication concept, where the number of rows and the quantity in each row are multiplied to determine the total amount. The equation simplifies the process by expressing the total as a product of the rows and the brownies in each row, resulting in 84 brownies.