Decimal Addition 3

Directions: Use the digits 1 to 9, at most one time each, to make a sum with the greatest possible value.

Hint

How do you place digits so the sum is less than ten?

Answer

The least possible value is 1.2 and you can get it using many combinations of digits including:
5.2 + 4.6 = 9.8
3.1 + 6.7 = 9.8
2.5 + 7.3 = 9.8

Source: Owen Kaplinsky and Robert Kaplinsky

Print Friendly, PDF & Email

Check Also

Equivalent Expressions with Fractions

Directions: Using the digits 0 to 9 at most one time each and choosing either …

11 comments

  1. The ‘least possible value is 1.2’ and you can get it using many combinations of digits including:
    5.2 + 4.6 = 9.8
    3.1 + 6.7 = 9.8
    2.5 + 7.3 = 9.8

    I think this should read:
    The greatest possible value is 9.8 and you can get it using many combinations of digits including:
    5.2 + 4.6 = 9.8
    3.1 + 6.7 = 9.8
    2.5 + 7.3 = 9.8

  2. Other solutions:

    5.6 + 4.2 = 9.8
    6.1 + 3.7 = 9.8
    4.7 + 5.1 = 9.8
    5.7 + 4.1 = 9.8
    2.3 + 7.5 = 9.8

  3. I thought you were suppose to add 1.9 +1.9 and i got 3.8.

    This is so hard!!!!!

  4. ig ot 6.7 + 3.1

  5. The least possible value is 1.2 and you can get it using many combinations of digits including:
    5.2 + 4.6 = 9.8
    3.1 + 6.7 = 9.8
    2.5 + 7.3 = 9.8

  6. 6.8+2.8=9.6
    7.8+1.8=9.8

  7. 5.2+4.6=9.8

Leave a Reply to Labron Cancel reply

Your email address will not be published.