Question 1

Arrange the numbers from smallest to largest.
-$0,-2.7,7.3,-3 \frac{1}{2}, 2.3$

Accepted Answer

A)  $-3 \frac{1}{2},-2.7,0,2.3,7.3$ 
B)  $7.3,2.3,0,-2.7,-3 \frac{1}{2}$ 
C)  $0,-3 \frac{1}{2},-2.7,2.3,7.3$ 
D)  $-2.7,-3 \frac{1}{2}, 2.3,7.3,0$ 
A)  $-3 \frac{1}{2},-2.7,0,2.3,7.3$ 
B)  $7.3,2.3,0,-2.7,-3 \frac{1}{2}$ 
C)  $0,-3 \frac{1}{2},-2.7,2.3,7.3$ 
D)  $-2.7,-3 \frac{1}{2}, 2.3,7.3,0$ A

Question 2

Simplify.
-$-4+3(-5)-2$

Accepted Answer

A)  25 
B)  -24 
C)  -20 
D)  -21 
A)  25 
B)  -24 
C)  -20 
D)  -21 D

Question 3

Find the product.
-$(-300)^{2}$

Accepted Answer

A)  900,000 
B)  $-900,000$ 
C)  $-90,000$ 
D)  90,000 
A)  900,000 
B)  $-900,000$ 
C)  $-90,000$ 
D)  90,000 D

Question 4

Divide.
-$2.4 \div(0.08)$

Accepted Answer

A)  $\frac{1}{30}$ 
B)  23.2 
C)  30 
D)  2.32 
A)  $\frac{1}{30}$ 
B)  23.2 
C)  30 
D)  2.32

Question 5

Find the sum.
-$-9.5+5.5$

Accepted Answer

A)  -4 
B)  4 
C)  -15 
D)  15 
A)  -4 
B)  4 
C)  -15 
D)  15

Question 6

Find the product.
-$(-4)^{4}$

Accepted Answer

A)  -255 
B)  256 
C)  -256 
D)  255 
A)  -255 
B)  256 
C)  -256 
D)  255

Question 7

Solve.
-The value of a stock rose by $\frac{1}{2}$ of a dollar and then dropped by $\frac{1}{9}$ of a dollar. What was the overall change in value?

Accepted Answer

A)  $-\frac{7}{18}$ 
B)  $\frac{7}{18}$ 
C)  $-\frac{4}{9}$ 
D)  $-\frac{1}{3}$ 
A)  $-\frac{7}{18}$ 
B)  $\frac{7}{18}$ 
C)  $-\frac{4}{9}$ 
D)  $-\frac{1}{3}$

Question 8

Give a written response.
-You are to be given three numbers to arrange from smallest to largest. You are told that one of the numbers is 0 , one is a positive number, and one is a negative number. Do you know what the order will be? Explain.

Accepted Answer

Negative number, 0,

Question 9

Multiply.
-$-7 \cdot(-2) \cdot 9 \cdot(-7)$

Accepted Answer

A)  -7 
B)  882 
C)  -882 
D)  133 
A)  -7 
B)  882 
C)  -882 
D)  133

Question 10

Subtract.
-0 - 11

Accepted Answer

A)  $\frac{1}{11}$ 
B)  -11 
C)  0 
D)  11 
A)  $\frac{1}{11}$ 
B)  -11 
C)  0 
D)  11

Question 11

Multiply.
-$-10 \cdot(-0.8) \cdot 3 \cdot(-0.02)$

Accepted Answer

A)  -4.8 
B)  0.48 
C)  -0.48 
D)  4.8 
A)  -4.8 
B)  0.48 
C)  -0.48 
D)  4.8

Question 12

Multiply.
-$-0.3 \cdot 3.30$

Accepted Answer

A)  3.6 
B)  0.99 
C)  -0.990 
D)  3 
A)  3.6 
B)  0.99 
C)  -0.990 
D)  3

Question 13

Simplify.
-$(-0.7)^{2}+0.7^{2}$

Accepted Answer

A)  0.98 
B)  1.03 
C)  0 
D)  -0.98 
A)  0.98 
B)  1.03 
C)  0 
D)  -0.98

Question 14

Give a written response.
-You are given information about three numbers, which you are to arrange from smallest to largest.
Number A: sign is negative; Absolute value is: 3.1
Number B: is a number which is neither positive nor negative
Number C: sign is negative; Absolute value is: 3.4
What will the order be? Explain.

Accepted Answer

Number C, Number A,

Question 15

Solve. Express your answer as a signed number.
-In a statistics course, you need to carry out the following computation: $\frac{(-0.8)^{2}+(0.1)^{2}+(0.4)^{2}+(-0.7)^{2}}{4}$. Find this number, rounded to the nearest hundredth.

Accepted Answer

A)  0.42 
B)  0.33 
C)  0.29 
D)  1.9 
A)  0.42 
B)  0.33 
C)  0.29 
D)  1.9

Question 16

Determine the sign and the absolute value of the number.
-2

Accepted Answer

A)  Sign: +; absolute value: -2 
B)  Sign: -; absolute value: -2 
C)  Sign: -; absolute value: 2 
D)  Sign: +; absolute value: 2 
A)  Sign: +; absolute value: -2 
B)  Sign: -; absolute value: -2 
C)  Sign: -; absolute value: 2 
D)  Sign: +; absolute value: 2

Question 17

Solve. Express your answer as a signed number.
-In a statistics course, you need to carry out the following computation: $\frac{(-0.8)^{2}+(0.4)^{2}+(0.1)^{2}}{3}$. Find this number, rounded to the nearest hundredth.

Accepted Answer

A)  0.1 
B)  0.5 
C)  0.27 
D)  0.84 
A)  0.1 
B)  0.5 
C)  0.27 
D)  0.84

Question 18

Solve the problem.
-During a drought, the water level in a river dropped 3 inches each day for 6 straight days. What was the change in the water level of the river during this this period?

Accepted Answer

A)  -9 inches 
B)  -18 inches 
C)  9 inches 
D)  18 inches 
A)  -9 inches 
B)  -18 inches 
C)  9 inches 
D)  18 inches

Question 19

Write a signed number for the statement.
-The team scored 12 points.

Accepted Answer

A)  -12 
B)  12 
A)  -12 
B)  12

Question 20

Solve the problem.
-To find the temperature in degrees Celsius corresponding to - 13 degrees Fahrenheit, you need to compute $\frac{5}{9} \cdot(-13-32)$. Simplify this expression.

Accepted Answer

A)  $7^{\circ} \mathrm{C}$ 
B)  $-28^{\circ} \mathrm{C}$ 
C)  $-23^{\circ} \mathrm{C}$ 
D)  $-25^{\circ} \mathrm{C}$ 
A)  $7^{\circ} \mathrm{C}$ 
B)  $-28^{\circ} \mathrm{C}$ 
C)  $-23^{\circ} \mathrm{C}$ 
D)  $-25^{\circ} \mathrm{C}$

Arrange the numbers from smallest to largest. - $0,-2.7,7.3,-3 \frac{1}{2}, 2.3$

Simplify. - $-4+3(-5)-2$

Find the product. - $(-300)^{2}$

Divide. - $2.4 \div(0.08)$

Find the sum. - $-9.5+5.5$

Find the product. - $(-4)^{4}$

Solve. -The value of a stock rose by $\frac{1}{2}$ of a dollar and then dropped by $\frac{1}{9}$ of a dollar. What was the overall change in value?

Give a written response. -You are to be given three numbers to arrange from smallest to largest. You are told that one of the numbers is 0 , one is a positive number, and one is a negative number. Do you know what the order will be? Explain.

Multiply. - $-7 \cdot(-2) \cdot 9 \cdot(-7)$

Subtract. -0 - 11

Multiply. - $-10 \cdot(-0.8) \cdot 3 \cdot(-0.02)$

Multiply. - $-0.3 \cdot 3.30$

Simplify. - $(-0.7)^{2}+0.7^{2}$

Solve. Express your answer as a signed number. -In a statistics course, you need to carry out the following computation: $\frac{(-0.8)^{2}+(0.1)^{2}+(0.4)^{2}+(-0.7)^{2}}{4}$ . Find this number, rounded to the nearest hundredth.

Determine the sign and the absolute value of the number. -2

Solve. Express your answer as a signed number. -In a statistics course, you need to carry out the following computation: $\frac{(-0.8)^{2}+(0.4)^{2}+(0.1)^{2}}{3}$ . Find this number, rounded to the nearest hundredth.

Solve the problem. -During a drought, the water level in a river dropped 3 inches each day for 6 straight days. What was the change in the water level of the river during this this period?

Write a signed number for the statement. -The team scored 12 points.

Solve the problem. -To find the temperature in degrees Celsius corresponding to - 13 degrees Fahrenheit, you need to compute $\frac{5}{9} \cdot(-13-32)$ . Simplify this expression.

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Exam 7: Signed Numbers

Arrange the numbers from smallest to largest. - 0,−2.7,7.3,−312,2.30,-2.7,7.3,-3 \frac{1}{2}, 2.30,−2.7,7.3,−321​,2.3

Simplify. - −4+3(−5)−2-4+3(-5)-2−4+3(−5)−2

Find the product. - (−300)2(-300)^{2}(−300)2

Divide. - 2.4÷(0.08)2.4 \div(0.08)2.4÷(0.08)

Find the sum. - −9.5+5.5-9.5+5.5−9.5+5.5

Find the product. - (−4)4(-4)^{4}(−4)4

Solve. -The value of a stock rose by 12\frac{1}{2}21​ of a dollar and then dropped by 19\frac{1}{9}91​ of a dollar. What was the overall change in value?