Home > Grade 5 > Adding Mixed Numbers

Adding Mixed Numbers

Directions: Make the largest sum by filling in the boxes using the whole numbers 1-9 no more than one time each.

Hint

Hint

How can we make a really big fraction?  If improper fractions are allowed, the numerators should be as big as possible and the denominators as small as possible.

Answer

Answer

The best I have found is 9 6/7 + 8 4/5 or 9 4/5 + 8 6/7.  Otherwise 9 8/1 + 7 6/2 or 9 6/2 + 7 8/1 would be best, assuming improper fractions could be allowed.

Source: Robert Kaplinsky

Print Friendly, PDF & Email

Check Also

Adding Mixed Numbers 3

Directions: Use the digits 1-9 each once to make a the largest possible sum. Source: …

8 comments

  1. No big deal, but I don’t think you’ve completely closed the end since 9 7/1 + 8 6/2 is the same (of course you can swap the order of the mixed numbers, too.)

  2. The way I read this was to multiply each whole number times the fraction first, then add the two terms. This adds a little twist, but works out to the same answer of 9(8/1) + 7(6/2) for a total of 93.

Leave a Reply

Your email address will not be published. Required fields are marked *