What Fun!
It's Practice with Scientific Notation!
Review of Scientific Notation
Scientific notation provides a place to hold the zeroes that come after a
whole number or before a fraction. The number 100,000,000 for example,
takes up a lot of room and takes time to write out, while 108 is much more
efficient.
Though we think of zero as having no value, zeroes can make a number much
bigger or smaller. Think about the difference between 10 dollars and 100
dollars. Even one zero can make a big difference in the value of the number.
In the same way, 0.1 (one-tenth) of the US military budget is much more than
0.01 (one-hundredth) of the budget.
The small number to the right of the 10 in scientific notation is called the
exponent. Note that a negative exponent indicates that the number is a
fraction (less than one).
The line below shows the equivalent values of decimal notation (the way we
write numbers usually, like "1,000 dollars") and scientific notation (103
dollars). For numbers smaller than one, the fraction is given as well.
smaller bigger
Fraction 1/100 1/10
Decimal notation 0.01 0.1 1 10 100 1,000
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Scientific notation 10-2 10-1 100 101 102 103
