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Calculator "Inverse"


When you invert a calculator readout, you hopefully can make these associations of digits to letters: 0 - O, 1 - I, 2 - Z, 3 - E, 4 - H, 5 - S, 6 - G, 7 - L, and 8 - B...with a creative "tilt" to your vision.


Read each of the following clues, do the associated calculation on your calculator, and then rotate your calculator 180o to find the answer.

  • Old Mother ____ when she wanted to wander...
    (1232 x 2) + 4748
  • Capitol of state famous for its potatoes
    (789 x 32) + (340 x 29)
  • Big pigs
    4 x (342 + 245)
  • Slept like a ______
    (987 - 683.5) x 2
  • Letters with windows in envelopes
    52,818 + 702
  • Snail's home
    2812 - (101 x 16)
  • Get down on your knees and ____
    (54,321 / 3) - (647 x 27)
  • They are found in belfries
    (29 x 146) + 12102 - 1,410,596
  • Santa drives one
    434,343 + (2 x 13,516)
  • You woudn't be so sweet, honey, if it weren't for _____
    (10 x 529) + (1728 / 36)
These examples may be stretching the word "humor" a little too much...but they are creative and could prompt your students to make up some of their own problems of this type.

Source: Douglas Shult, The Computing Teacher, June/July 1980, pp. 40-41