Q&A: Can someone oder these from least to greatest?

November 23rd, 2011

Question by Nicole Borm: Can someone oder these from least to greatest?
-3, -5 -3 -7.

Best answer:

Answer by DAVID
-3, -5, -3, -7.

Multiply all bottom numbers together: 7 x 6 x 5 x 9 = 1890. Multiply each top number by 1890 divided by the respective bottom number. Replace bottom number with 1890. Then fractions can be easily compared. Remember when ordering minus numbers the least number is the one that would be the greatest if it were a positive number. So, for example, -4 is less than -2.

-3/7 = -3 x (1890/7) / 1890 = -810/1890
-5/6 = -5 x (1890/6) / 1890 = -1575/1890
-3/5 = -3 x (1890/5) / 1890 = -1134/1890
-7/9 = -7 x (1890/9) / 1890 = -1470/1890

Least to greatest: -5/6 (-1575/1890); -7/9 (-1470/1890); -3/5 (-1134/1890); -3/7 (-810/1890).

Hope you follow my working.

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