A good friend of mine posted this picture on facebook.
I think it’s very clever, especially since it’s done completely with ‘9’s. And it got me thinking . . .
I could ask students to make up problems with a given answer. For very young children that would just be ‘adds’ and ‘take aways’. So . . . give me an add that comes out to be 9. For older kids it could involve ‘multiply’s or ‘divide’s or square roots or exponents.
Hmmm . . . I’m liking this!!
I find that it can help students understand mathematical structures and procedures when then are asked to work the process backwards and forwards.