Question

There are $18$ oil paint tubes in the pack. Some of them are without caps. If $9$ are with caps, how many are without caps? Identify the set of addition and subtraction equations that represent the problem.

• A. $8;9+8=18,18–8=9$
• B. $9;9+9=18,18–9=9$
• C. $27;18+9=27,27–9=18$
• D. $10;10+9=18,18–9=10$

Answer 1

The correct option is B $9;9+9=18,18–9=9$

Total number of paint tubes $=18$
Number of paint tubes with caps $=9$
We need to find the number of paint tubes without caps.
As per the given information, we need to find how much we need to add to $9$ to make $18$.
Therefore, the equations that can be framed are $9+?=18$ and $18–9=?$



Hence, Option C is correct, $9$ paint tubes are without caps, and the correct equations framed are $9+9=18$ and $18–9=9$.