Fractions - Using a Pizza to Illustrate Fractions
Remember when you said you didn't want to learn fractions because you said you would never use them? Well. It's not true. You use them for cooking all the time. You use them in cutting a pizza.
Fractions, as used in describing the following pizza. I cooked a Pepperoni and Sausage pizza. I added several cut green olives to it. After it was cooked to a melted cheese wonder, I sat it on top of a cutting board.
As an uncut pizza, it was whole. Let me repeat that. It was whole. Whole is a fraction term. Whole is what you start with. No fractions.
I sliced the pizza across with a pizza cutter. I sliced right down the middle all the way across and made two pieces.My pizza was cut in half. There were two pieces of pizza at this point. The two pieces made one pizza. So, I can say I have two halves of a pizza. We write two halves like 2/2. One of the pieces is 1/2. The "/" means of. 1/2 plus 1/2 equals 1 whole pizza.
Then. I turned the pizza and cut it across again. I had four equal slices. Those four pieces are now fourths, because there are four of them. Written 1/4. 1/4 plus 1/4 plus 1/4 plus 1/4 equals 1 whole pizza.
Then, I cut across the entire pizza again, through each 1/4 section. Now I have eight pieces of pizza. Written 1/8;. 1/8 plus 1/8 plus 1/8 plus 1/8 plus 1/8 plus 1/8 plus 1/8 plus 1/8 equals 1 whole pizza.
It Is Less Complicated than You Think
You know that most people will cut a pizza into eight pieces. Some people do not care and cut squares. Those squares are also math, but, we are not cutting this pizza into squares.
Fractions are wedges in my example.
Subtracting Fractions is Easy Enough
I ate one slice at this point. Remember it was cut into eighths? There are 7 pieces left. Written 7/8. Seven of eight pieces remain.
Not for long. Soon there was 6/8. Then 5/8, then 4/8. then 3/8, then, well. I put 2/8 of the pizza into the refrigerator. I wasn't really hungry and I probably should not have eaten almost all of the pizza, but it happens.