I mastered addition the other day, so I will start learning subtraction today.
The area that I am good at most in math is subtraction.
In physics problems, we don’t come across vector subtraction very often, but it does pop up sometimes.
What's a method to decrease something? Well, you take something away. You do subtraction.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well. Note that the ほう changes to ぽう. This is because you're trying to subtract Polar (ぽう) bears from the area around you as they're very dangerous and you use a cologne made from meat.