Page 26 - ArithBook5thEd ~ BCC
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7.
136
× 27
8.
308
× 109
9.
21 03
× 44
10.
837
× 54
1.4 Powers of Whole Numbers
If we start with 1 and repeatedly multiply by 3, 4 times over, we get a number that is called the 4th
power of 3, written
4
3 =1 × 3 × 3 × 3 × 3.
The factor of 1 is understood and usually omitted. Instead we simply write
4
3 =3 × 3 × 3 × 3.
4
In the expression 3 ,3 is called the base,and 4 the exponent (or power).
5
Example 19. The 5th power of 2, or 2 , is the product
2 × 2 × 2 × 2 × 2= 32.
3
The 3rd power of 4, or 4 , is the product
4 × 4 × 4= 64.
We make the following definition in the cases where the exponentis 0.
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