What is the focus of a change-unknown word problem based on the total number of animals on a farm?

What is the focus of a change-unknown word problem based on the total number of animals on a farm?

• A. How many more chickens are on the farm than pigs?
• B. How many total eggs are laid each day?
• C. How many ducks join the farm to reach a total of 25 animals?
• D. How many animals are there all together now?

Answer: (C)

The focus of a change-unknown word problem is to identify the variable in a scenario that involves a change in quantity, which is related to the total number of items or animals being considered. In this case, option C specifically addresses a scenario where a certain number of ducks are added to the farm to reach a predefined total of 25 animals. This reflects the essence of a change-unknown problem since it requires determining how many additional animals (ducks) are necessary to reach that total. In this context, the problem involves a starting number of animals and an increase in that number, with the goal of finding out how many more are needed to achieve a target. This situation encapsulates the essential characteristics of a change-unknown word problem, where the focus is on the unknown change needed to reach a specific goal.

The focus of a change-unknown word problem is to identify the variable in a scenario that involves a change in quantity, which is related to the total number of items or animals being considered. In this case, option C specifically addresses a scenario where a certain number of ducks are added to the farm to reach a predefined total of 25 animals. This reflects the essence of a change-unknown problem since it requires determining how many additional animals (ducks) are necessary to reach that total.

In this context, the problem involves a starting number of animals and an increase in that number, with the goal of finding out how many more are needed to achieve a target. This situation encapsulates the essential characteristics of a change-unknown word problem, where the focus is on the unknown change needed to reach a specific goal.