Question

Out of $19$ water bottles, $13$ are inside a box and a few are outside. Select the correct equation to find the number of bottles that are outside

• A. $19-13=16$
• B. $19-13=6$
• C. $13-19=6$
• D. $19-13=7$

Answer 1

The correct option is B $19-13=6$

Say: The total number of water bottles inside and outside the box are given.

Ask:
What do we have to do here?
Ans: Find the number of bottles that are outside.

What is the total number of water bottles?
Ans: $19$

How many water bottles are inside the box?
Ans: $13$

What is the number of water bottles that are outside the box?
Ans: $6$
How did you find the answer?
Ans: By subtracting the smaller number, i.e. $13$, from the greater number, i.e. $19$. We get a difference of $6$.

What is the subtraction equation here?
Ans: $19–13=6$

Hence, Option B is correct.


WB: If required, use the whiteboard to represent the total number of water bottles using counters on a number frame. Then cross out the number of water bottles that are inside the box as shown and write the subtraction equation.