Question

The number of pink paint cans is $1$ more than the number of gray paint cans. There are $8$ gray paint cans. Which of the following models correctly shows the total number of paint cans of each color?

• A.
• B.
• C.
• D.

Answer 1

The correct option is D

We can find the total number of paint cans by adding the number of gray paint cans and the number of pink paint cans.

If Option A is chosen,


Based on the given equation, $8+8=16$ means the number of gray paint cans is $8$, and the number of pink paint cans is also $8$. The total number of paint cans is $16$, but the calculation is incorrect because the number of pink paint cans should be $1$ more than $8$. Therefore, Option A is incorrect.

If Option C is chosen,


Based on the given equation, $8+9=16$ means the number of gray paint cans is $8$, and the number of pink paint cans is $9$, and the number of pink paint cans is $1$ more than the number of gray paint cans. The total number of paint cans is $16$, but the calculation is incorrect because $9$ is broken into $2$ and $6$ which make $8$. Therefore, Option C is incorrect.

If Option D is chosen,



Based on the given equation, $8+9=15$ means the number of gray paint cans is $8$, and the number of pink paint cans is $9$, and the number of pink paint cans is $1$ more than the number of gray paint cans. The total number of paint cans is $15$, but the calculation is incorrect because $8$ and $4$ make $12$. Therefore, Option D is incorrect.

If Option B is chosen,


Based on the given equation, $8+9=17$ means the number of gray paint cans is $8$, and the number of pink paint cans is $9$. The total number of paint cans is $17$. The calculations are correct as $9$ is broken into $2$ and $7$, while $8$ and $2$ make $10$, and finally $10$ and $7$ are added to get $17$.

Therefore, there are $17$ paint cans in all.

Hence, Option B is correct.