Question

There are $2$ big fish, $1$ medium-sized fish, and $12$ small fish in a pond. Which of the following equations will help us find the total number of fishes in the pond?

• A. $12+2=14$
• B. $2+1+12=14$
• C. $12+2+1=15$
• D. $2+1+12=16$

Answer 1

The correct option is C $12+2+1=15$

Solution: Option A

Say: Let’s read the question and observe the image.

Ask:
What is the number of each type of fish?
Ans: Big fish: 2, Medium-sized fish: 1, Small fish: 12

Which two numbers do we have to add first to find the correct total number of fish?
Ans: We can add any two numbers first to find the total number of fish, because it does not matter in which order we add, if the same three numbers are added, the total will always be the same.

How many fishes are there altogether?
Ans: 15

What will be the addition equation for the problem?
Ans: $2+1+12=15$

Hence, option A is the correct answer.

WB: If required, use the whiteboard to draw the number frame and write the equation.


Probing Question:
Q: Can you frame another addition equation with 3 addends whose sum is 15? Share the equation.
A: $5+5+5=15$
Note: Accept any correct response from the student and appreciate the attempt.