Pizza Fractions Fun! Getting started and equivalents

We purchased a set of pizza fractions when my son was ready to learn about them, and have found them to be a lot of fun! This is the one we purchased, that you’ll see pictured:

You could also make your own if you are good at that sort of thing.

Initial concepts:

First explain what the notations on the pizza slices mean. 1/2 means it takes 2 equal pieces to make a whole pizza. 1/3 means it takes 3 identical pieces to make a whole pizza.

Explain what it means when a number larger than one is on the top. For example, 3/6 means 3 1/6 pieces together.

You may also need to teach them how to pronounce the fractions, depending on the age of your child – “one half” or “two thirds” for example.

Equivalent fractions:

Next have them develop their own table of equivalencies. To do this, start by organizing the pizza pieces into piles by their denominator (all thirds together, all sixths together, etc).

Create a chart for them to fill in similar to this one:

Give a demonstration. Tell them you want them to find other fractions that are the same size as the 1/2 pizza piece. Get a 1/2 pizza piece and set in front of them. Then, take pieces from the 1/3 pile and ask them to see if they can get the 1/3 pieces to cover the same amount of pizza as the 1/2. They can determine this by laying them on top of the 1/2 piece. The answer will be no, so they can draw an X in the 1/3 column. Next they should try the 1/4s. They will find that 2 1/4 pieces will exactly cover the 1/2 piece, so they should write 2/4 in the 1/4s colum.

Once they are done they’ll have a chart similar to this:

They can then write up their cheat sheet:
1/2 = 2/4 = 3/6 = 4/8 = 5/10 = 6/12
1/3 = 2/6 = 3/9 = 4/12
1/4 = 2/8 = 3/12
1/5 =2/10 = 3/15

OK that’s our activity for today! Upcoming are lessons on adding / subtracting and on multiplying / dividing fractions – with pizza fractions!

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