The correct option is
A 3Subtract
3 from
6 ⇒6−3
Let's apply chip model to solve the above expression.
6 represents six positive chips.
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1121326/original_6.JPG)
To subtract 3 we remove three positive chips from the group of 6 chips.
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1121330/original_3.JPG)
Hence, we are left with there positive chips.
∴ The answer is 3.