Question

There are $7$ violins in the store room. The number of violins on display are $4$ fewer than in the store room. How many violins are there on display? Choose the correct equation to find the total number of violins.

• A. $4;7+4=11$
• B. $4;7+7=14$
• C. $3;7+3=10$
• D. $3;7-4=3$

Answer 1

The correct option is C $3;7+3=10$

Solution: Option A

Say: Let us begin by finding the number of violins on display.

Ask:
How many violins are in the store room?
Ans: $7$

How many violins are on display?
Ans: $4$ fewer than the number of violins in the store room.

How will you find the number of violins on display'?
Ans: By counting backward from $7$ till $4$.

So, how many is that?
Ans: $3$

Say: Now, let us find the total number of violins.

Ask:
How will we find the total number of violins?
Ans: By adding the number of violins in the store room and the number of violins on display.

How many violins are there in the store room?
Ans: $7$

How many violins are there on display?
Ans: $3$

What equation will be framed?
Ans: $7+3=10$

So, how many violins are there in total?
Ans: $10$

Hence, Option A is correct.

WB: If required, use the whiteboard to represent the number of violins in the store room and the number of violins on display as shown and write the addition equation.

Show how 10 units are grouped together to form 1 rod.

Probing Q: Do we need to add or subtract to find the number of violins on display? Will we count backward or forward?

Ans: We need to subtract, as the number of violins on display are “fewer” than the number of violins in the store room, so we will count backward.