I want to know if students really understand how to use a ratio table. I’m going to have them create their own examples for each of the following approaches:

Adding

Doubling

Subtracting

Times 10

Halving

Multiplying

If time permits, I’m going to have them come up with other approaches to use when filling in a new column. (x3,x4,x5 etc). I would like them to say that the approach you use will depend on what you are trying to find. If you know your multiplication facts then it would be good to use multiplication. If you are not so good at them, then easier multiplication or addition would be best.