Big Ideas Math: Modeling Real Life, Grade 8
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Exercise 39 Page 365

Move the decimal according to the exponent of 10.

20 000 000

Practice makes perfect

A number written in scientific notation usually expresses a very large or very small number by writing its value as a product of 10 to some power. Let's look at some examples.

Scientific Notation Standard Notation
5 * 10^(10) 5 0 000 000 000
5 * 10^5 5 00 000
5 * 10^1 5 0
5 * 10^0 5
5 * 10^(- 1) 0.5
5 * 10^(- 5) 0.00005
5 * 10^(- 10) 0.0000000005
To change from scientific notation to standard form, move the decimal of the given number according to the exponent of 10.

2* 10^7 In this case, the exponent is positive7, so we should move the decimal seven places to the right.

Therefore, the standard form of 2* 10^7 is 20 000 000. Scientific Notation:& 2* 10^7 Standard Form:& 20 000 000