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Sums to 100

Directions: Using the digits 1 to 9 at most one time each, fill in the boxes to create the closest possible sum to 100.



Can you give me 3 numbers that add up to 100 (any number could be repeated)? How can we use this to fill in the boxes using each digit only once?



Multiple solutions


Source: Graham Fletcher

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Directions: Use only the digits 1 to 7, at most one time each, fill in …


  1. 49 + 32 + 18 = 99

  2. Our answer was 29+18+53=100

  3. I had a lot of fun with this challenge and passed it along to my family when I couldn’t figure it out! Looking for more of these challenges in the future!

  4. 23+56+18=100

    If I can get my students with behaviors to do this at 3 or upper I will challenge them to do this during morning warmup.

  5. One of my classes came up with 42+38+19. It was great to see them put together the tens first, then they added all of the ones, and finally added the ones and tens for the final answer.

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