Answer: If the net weight is 25 oz, and the tolerance is 1.2 oz, then the minimum weight is the net minus the tolerance, or 25 oz - 1.2 oz = 23.8 oz.
Similarly, the maximum weight will be the net plus the tolerance, or 25 oz + 1.2 oz = 26.2oz.
So the weight must be between 23,8 oz and 26.2 oz, and you can write this as : 23.8 oz < W < 26.2 oz. (where W is the weight of the box of cereal)