If you don't know what it is, it's a number "game" or challenge where you build each of the numbers from 1 to 100 using the digits 2, 0, 1, and 7 -- and you HAVE to use all those digits!
For example:
10 = 2 + 0 + 1 + 7
8 = 2 x 0 + 1 + 7
7 = 2 x 0 + 1 x 7
...and so on. I'm sure you get the gist!
Read the complete rules for this game here.
from Homeschool Math Blog http://ift.tt/2iUGwe2
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