What better way to estimate then to be given the EXACT answers to a set of paired numbers to be added or subtracted? Estimation is not about steps. It is about using whatever mental mean necessary to find a close answer quickly. ESTIMATION: AN EASY WAY TO FIND AN ANSWER THAT IS CLOSE.
This matching worksheet gives 9 pairs of numbers from 3 to 6 digits which are either added or subtracted. The exact sums and differences are on the other side. Estimation strategies will make this simple for your students...which is the true goal of learning estimation!
Some students will find the exact answers. The truly astute ones will be done with this quickly, however!
Note: From experience I use E and skip F, because often the "blank" makes these letters difficult to discern. The same is true for I and J.
These will be tough, as some of the responses are in a close range to each other. This will help them learn refinement skills.