Worked examples
Two examples
Example 1
Write as an ordinary number: 3.2 × 105
- The exponent is 5: move the point 5 places to the right, writing zeros to fill.
Answer: 320,000
Example 2
Write as an ordinary number: 4.7 × 10−3
- The exponent is −3: move the point 3 places to the left.
Answer: 0.0047
Where this is taught: Quiz 32: Scientific Notation, “Reading it back”
The drill
Ten problems
This drill also has challenge problems. They use the same skill, set up the way the GED test sometimes sets up a problem, so that it looks new at first.
How many:
Type each answer, then press Check my answers at the bottom. Commas in large numbers are fine.Write each answer on the line. The answer key, with the reasoning, is on the last page.