Chapter 1

Determine whether the given statement is always true. If the statement is true, indicate which property of the integers it illustrates. $$9+3=3+9$$

In Exercises \(1-72\), compute the value of each expression. $$6-(+10)$$

In Exercises \(1-66,\) compute the value of each expression. $$+6+(-8)$$

Evaluate each of the following expressions, if possible. $$(+7)(-4)$$

Compute the given expression. Round off your answer to two decimal places where necessary. $$4.2+5.9$$

Indicate whether the given statement is true or false. $$3 \in\\{1,3,5,8\\}$$

Determine whether the given statement is always true. If the statement is true, indicate which property of the integers it illustrates. $$10+5=5+10$$

In Exercises \(1-72\), compute the value of each expression. $$4-(+8)$$

In Exercises \(1-66,\) compute the value of each expression. $$+8+(-10)$$

Evaluate each of the following expressions, if possible. $$(+6)(-3)$$

Compute the given expression. Round off your answer to two decimal places where necessary. $$3.4+8.8$$

Indicate whether the given statement is true or false. $$5 \in(1,3,5,8)$$

Determine whether the given statement is always true. If the statement is true, indicate which property of the integers it illustrates. $$x+3=3+x$$

In Exercises \(1-66,\) compute the value of each expression. $$-7+(-5)$$

Evaluate each of the following expressions, if possible. $$(-7)(+4)$$

Compute the given expression. Round off your answer to two decimal places where necessary. $$4(5.1)$$

Determine whether the given statement is always true. If the statement is true, indicate which property of the integers it illustrates. $$a+5=5+a$$

In Exercises \(1-66,\) compute the value of each expression. $$-11+(-3)$$

Evaluate each of the following expressions, if possible. $$(-6)(+3)$$

Compute the given expression. Round off your answer to two decimal places where necessary. $$6(3.9)$$

Indicate whether the given statement is true or false. $$7 \in\\{2,4,6,9,17\\}$$

In Exercises \(1-72\), compute the value of each expression. $$3-(-6)$$

In Exercises \(1-66,\) compute the value of each expression. $$-5+(+12)$$

Evaluate each of the following expressions, if possible. $$(-7)(-4)$$

Compute the given expression. Round off your answer to two decimal places where necessary. $$\frac{12.8}{3.2}$$

Indicate whether the given statement is true or false. $$\mathbf{a} \in\\{\mathbf{b}, \mathbf{c}, \mathbf{d}, \mathbf{a}\\}$$

In Exercises \(1-72\), compute the value of each expression. $$5-(-7)$$

In Exercises \(1-66,\) compute the value of each expression. $$-8+(+13)$$

Evaluate each of the following expressions, if possible. $$(-6)(-3)$$

Compute the given expression. Round off your answer to two decimal places where necessary. $$\frac{21.9}{7.3}$$

In Exercises \(1-72\), compute the value of each expression. $$-8-(-2)$$

In Exercises \(1-66,\) compute the value of each expression. $$+9+(-4)$$

Evaluate each of the following expressions, if possible. $$-7-4$$

Compute the given expression. Round off your answer to two decimal places where necessary. $$\frac{36.8}{1.5}$$

Determine whether the given statement is always true. If the statement is true, indicate which property of the integers it illustrates. $$a-5=5-a$$

In Exercises \(1-72\), compute the value of each expression. $$-6-(-4)$$

In Exercises \(1-66,\) compute the value of each expression. $$+7+(-6)$$

Compute the given expression. Round off your answer to two decimal places where necessary. $$\frac{42.6}{2.4}$$

Evaluate each of the following expressions, if possible. $$-6-3$$

Indicate whether the given statement is true or false. $$12 \notin N$$

In Exercises \(1-72\), compute the value of each expression. $$-5+(+8)$$

Determine whether the given statement is always true. If the statement is true, indicate which property of the integers it illustrates. $$9 \cdot 3=3 \cdot 9$$

In Exercises \(1-66,\) compute the value of each expression. $$+7+(-3)$$

Compute the given expression. Round off your answer to two decimal places where necessary. $$\frac{8}{0.2}+\frac{12}{0.4}$$

Evaluate each of the following expressions, if possible. $$-(-7-4)$$

In Exercises \(1-72\), compute the value of each expression. $$-7+(+5)$$

Determine whether the given statement is always true. If the statement is true, indicate which property of the integers it illustrates. $$10 \cdot 5=5 \cdot 10$$

Compute the given expression. Round off your answer to two decimal places where necessary. $$\frac{10}{0.25}+\frac{5}{0.1}$$

In Exercises \(1-66,\) compute the value of each expression. $$+9+(-8)$$

Evaluate each of the following expressions, if possible. $$-(-6-3)$$