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Differences in Scientific Notation

Directions: Using the digits 1 to 9 at most one time each, fill in the boxes to make the largest (or smallest) absolute difference.

Hint

Hint

What are the biggest and smallest numbers you can make with these digits in scientific notation?
Try thinking of the numbers you create on a number line.

Answer

Answer

Largest: 8×10^9 – 2×10^1
Smallest 3×10^2 – 9×10^1

Source: Marie Isaac

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One comment

  1. For smallest difference, one of my classes found the following:

    1 x 10^3 – 9 x 10^2

    1 x 1000 – 9 x 100

    1000 – 900 = 100

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