Hot . . . Cold
Wet . . . Dry
New . . . Old
Open . . . Shut
Children can grasp the idea of opposites at a young age. If you take advantage of this concept when teaching math, it cuts your work in half!
Instead of teaching subtraction, teach “opposite addition”. If you know that 3 + 5 = 8, then you can do the opposite. When you see this problem: 8 – 5 =___, just make it into a backwards addition problem. Start at the opposite end (the back) and add this way: what number plus 5 equals 8 ?