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

106.

107.

108.

109.

110.

111–114 Find the sums and differences of the decimal numbers and variable expressions.

111.

112.

113.

114.

115–118 Find the products of the decimal numbers and variable expressions.

115.

116.

117.

118.

119–124 Find the quotients of the decimal numbers. Round the answer to three decimal places, if necessary.

119.

120.

121.

122.

123.

124.

125–132 Rewrite each fraction as an equivalent decimal.

125.

126.

127.

128.

129.

130.

131.

132.

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…

Chapter 4

An exponential expression consists of a base and a power. The general format of an exponential expression is b n, 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.

141.

142.

143.