Expressing Numbers in Scientific Notation and Standard Form
Expressing Numbers in Scientific Notation and Standard Form
Number Sense Number One
Number: ____________________________________________________________
1. The popular children’s book, “The Cat in the Hat” by Dr. Suess, has reportedly made 5.9 x 106 in sales since its publication in 1957. How much money is that in standard form?
2. The mass of one hydrogen atom is 0.000000000000000000000001674g. Represent that mass as a number in scientific notation.
3. In 1993, The Kroger Company reported 22,145,000,000 in annual sales. Represent the amount of annual sales as a number in scientific notation.
4. The width of a plant cell is 1.27 x 10 -7 meters wide. How wide is that in standard form?
5. In the year 2000, the estimated population of China was 1.26 x 109 people. How many people was that in standard form?
6. The closest star besides the sun to Earth is the star Proxima Centauri. It is approximately 2.5x1013 miles away from Earth. How far is that in standard form?
7. The approximate time for light to travel one meter is roughly 3x10-9 seconds. How many seconds is that in standard form?
8. The radius of a hydrogen atom is 0.000000000025m. Express the radius as a number in scientific notation.
9. The most abundant class of animals are the insect and spider class. There are at least 5,000,000,000,000,000 known individuals. Express the number of individuals as a number in scientific notation.
10. The size of the atomic nucleus of a lead atom is 7.1x10-15m. Express that number in standard form.
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