Subtracting 3-Digit Numbers 1

Directions: Using the digits 1 to 9 at most one time each, place a digit in each box to make two different pairs of three-digit numbers that form a true number sentence. You may reuse all the digits each difference.

Hint

How can we determine which digits would be poor choices to place?

Answer

There are many possible answers including 874 – 291 = 583 and 587 – 291 = 296. To be clear, the 291 in the number being subtracted to not count as being used.

Source: Robert Kaplinsky

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One comment

  1. I am working on this with my students right now and they were curious why you decided to subtract 291 of all the 3 digit numbers. Thanks!

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