Open Middle®
Directions: Using the digits 1 to 9 at most one time each, place a digit in the boxes to make a difference that is as close to 329 as possible.
Hint
What strategies might you use to find the numbers? (Possibilities including subtracting as well as adding up).
Answer
There are many possible answers including 871 – 542.
Source: Robert Kaplinsky
916-587
578-249
983-654= 329
971-642
972-643
572-243=329
491 – 162 = 329