Algebra I: 1001 Practice Problems For Dummies (+ Free Online Practice). Mary Jane Sterling

Algebra I: 1001 Practice Problems For Dummies (+ Free Online Practice) - Mary Jane Sterling


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      133–140 Rewrite each decimal as an equivalent fraction.

      133. 0.75

      134. 0.875

      135. 0.0008

      136. 0.1525

      137. 0.888…

      138. 0.636363…

      139. 0.261261…

      140. 0.285714285714…

      Making Exponential Expressions and Operations More Compatible

      An exponential expression consists of a base and a power. The general format of an exponential expression is bn, where b is the base and n is the power or exponent. The base, b, has to be a positive number, and the power, n, is a real number. Positive powers, negative powers, and fractional powers all have special meanings and designations.

      Here are some of the things you do in this chapter:

       Multiplying and dividing exponential factors with the same base

       Raising a power to a power — putting an exponent on an exponential expression

       Combining operations — deciding what comes first when multiplying, dividing, and raising to powers

       Changing numbers to the same base so they can be combined

       Writing numbers using scientific notation

      Be sure you also remember the following:

       Writing fractional expressions by using the correct power of a base

       Recognizing a common base in different numbers

       Remembering when to add, subtract, and multiply the exponents

       Using the correct power of ten in scientific notation expressions

      141–150 Perform the operations and simplify.

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      151–160 Compute the powers and simplify your answers.

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      161–170 Use the order of operations to compute the final answers.

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      171–180 Perform the operations by changing the numbers to the same base.

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