Question 1

Find the sum.
-$-8.1+(-7.4)$

Accepted Answer

A)  0.7 
B)  -0.7 
C)  15.5 
D)  -15.5 
A)  0.7 
B)  -0.7 
C)  15.5 
D)  -15.5

Question 2

Perform the indicated operation or operations.
-$\left(-\frac{7}{5}\right)\left(\frac{8}{5}\right)$

Accepted Answer

A)  $-\frac{56}{25}$ 
B)  $-\frac{7}{25}$ 
C)  $\frac{15}{0}$ 
D)  $-\frac{8}{7}$ 
A)  $-\frac{56}{25}$ 
B)  $-\frac{7}{25}$ 
C)  $\frac{15}{0}$ 
D)  $-\frac{8}{7}$

Question 3

Multiply.
-(-1)(11)

Accepted Answer

A)  -11 
B)  1 
C)  11 
D)  -1 
A)  -11 
B)  1 
C)  11 
D)  -1

Question 4

Find the quotient. Simplify.
-$18 \div(-2)$

Accepted Answer

A)  9 
B)  -9 
C)  -10 
D)  10 
A)  9 
B)  -9 
C)  -10 
D)  10

Question 5

Evaluate.
-$\frac{1}{3} \div(-8)$

Accepted Answer

A)  $-\frac{8}{3}$ 
B)  -24 
C)  $\frac{1}{24}$ 
D)  $-\frac{1}{24}$ 
A)  $-\frac{8}{3}$ 
B)  -24 
C)  $\frac{1}{24}$ 
D)  $-\frac{1}{24}$

Question 6

Give a written response.
-Can you name a number whose absolute value is 40 ? Explain your answer.

Accepted Answer

There are two: -40 a

Question 7

Graph the numbers on the number line.
-$-4,-2,0,2$

Accepted Answer

A) 
  
B)    
C) 
  
D)    
A) 
  
B)    
C) 
  
D)

Question 8

Decide if the inequality is correct.
-$-\frac{5}{2}<-\frac{7}{2}$

Accepted Answer

A) True 
 B)False

Question 9

Add.
-$(-3.07)+0.57+(-4.03)$

Accepted Answer

A)  -6.53 
B)  0.39 
C)  1.53 
D)  -7.67 
A)  -6.53 
B)  0.39 
C)  1.53 
D)  -7.67

Question 10

Combine.
-$-14+7-5+(-16)$

Accepted Answer

A)  -32 
B)  -18 
C)  4 
D)  -28 
A)  -32 
B)  -18 
C)  4 
D)  -28

Question 11

Insert parentheses, if needed, to make the expression on the left equal to the number on the right.
-$-4+18 \div 7-20=-18$

Accepted Answer

A)  $(-4+18) \div(7-20)=-18$ 
B)  $-4+18 \div 7-20=-18$ 
C)  $-4+18 \div(7-20)=-18$ 
D)  $(-4+18) \div 7-20=-18$ 
A)  $(-4+18) \div(7-20)=-18$ 
B)  $-4+18 \div 7-20=-18$ 
C)  $-4+18 \div(7-20)=-18$ 
D)  $(-4+18) \div 7-20=-18$

Question 12

Find the absolute value.
-$|-0.019|$

Accepted Answer

A)  0.038 
B)  0.019 
C)  -0.019 
D)  0 
A)  0.038 
B)  0.019 
C)  -0.019 
D)  0

Question 13

Subtract.
-$-80-(-59)$

Accepted Answer

A)  21 
B)  -139 
C)  -21 
D)  139 
A)  21 
B)  -139 
C)  -21 
D)  139

Question 14

Solve.
-The average summer temperature in the Antarctica was $-25^{\circ} \mathrm{F}$ and the average winter temperature was $-56^{\circ} \mathrm{F}$. How much higher was the summer average temperature?

Accepted Answer

A)  $81^{\circ} \mathrm{F}$ 
B)  $31^{\circ} \mathrm{F}$ 
C)  $-81^{\circ} \mathrm{F}$ 
D)  $-31^{\circ} \mathrm{F}$ 
A)  $81^{\circ} \mathrm{F}$ 
B)  $31^{\circ} \mathrm{F}$ 
C)  $-81^{\circ} \mathrm{F}$ 
D)  $-31^{\circ} \mathrm{F}$

Question 15

Find the quotient. Simplify.
-$(-6) \div(-1)$

Accepted Answer

A)  6 
B)  -6 
C)  1 
D)  -1 
A)  6 
B)  -6 
C)  1 
D)  -1

Question 16

Add. Do not use a number line except as a check.
-$-\frac{2}{5}+\frac{1}{15}$

Accepted Answer

A)  $\frac{7}{15}$ 
B)  $\frac{1}{3}$ 
C)  $-\frac{1}{3}$ 
D)  $-\frac{7}{15}$ 
A)  $\frac{7}{15}$ 
B)  $\frac{1}{3}$ 
C)  $-\frac{1}{3}$ 
D)  $-\frac{7}{15}$

Question 17

Solve the problem.
-A sleeping bag is good for temperatures down to $-15^{\circ} \mathrm{F}$. Should this sleeping bag be used if the temperature is $-28^{\circ} \mathrm{F}$ ?

Accepted Answer

A) True 
 B)False

Question 18

Find the sum.
-$-2.7+(-2.4)$

Accepted Answer

A)  0.3 
B)  5.1 
C)  -5.1 
D)  -0.3 
A)  0.3 
B)  5.1 
C)  -5.1 
D)  -0.3

Question 19

Arrange the numbers from smallest to largest.
-$-7.7,-7 \frac{1}{2},-9,-7.6$

Accepted Answer

A)  $-9,-7.7,-7.6,-7 \frac{1}{2}$ 
B) $-7 \frac{1}{2},-7.6,-7.7,-9$ 
C)  $-9,-7.6,-7 \frac{1}{2},-7.7$ 
D)  $-7 \frac{1}{2},-9,-7.6,-7.7$ 
A)  $-9,-7.7,-7.6,-7 \frac{1}{2}$ 
B) $-7 \frac{1}{2},-7.6,-7.7,-9$ 
C)  $-9,-7.6,-7 \frac{1}{2},-7.7$ 
D)  $-7 \frac{1}{2},-9,-7.6,-7.7$

Question 20

Solve. Express your answer as a signed number.
-In 4 days, the value of a share of stock dropped by 26 points. What was the average daily change in value?

Accepted Answer

A)  $-6 \frac{1}{2}$ points 
B)  $7 \frac{1}{2}$ points 
C)  -7 points 
D)  6 points 
A)  $-6 \frac{1}{2}$ points 
B)  $7 \frac{1}{2}$ points 
C)  -7 points 
D)  6 points

Find the sum. - $-8.1+(-7.4)$

Perform the indicated operation or operations. - $\left(-\frac{7}{5}\right)\left(\frac{8}{5}\right)$

Multiply. -(-1)(11)

Find the quotient. Simplify. - $18 \div(-2)$

Evaluate. - $\frac{1}{3} \div(-8)$

Give a written response. -Can you name a number whose absolute value is 40 ? Explain your answer.

Graph the numbers on the number line. - $-4,-2,0,2$

Decide if the inequality is correct. - $-\frac{5}{2}<-\frac{7}{2}$

Add. - $(-3.07)+0.57+(-4.03)$

Combine. - $-14+7-5+(-16)$

Insert parentheses, if needed, to make the expression on the left equal to the number on the right. - $-4+18 \div 7-20=-18$

Find the absolute value. - $|-0.019|$

Subtract. - $-80-(-59)$

Solve. -The average summer temperature in the Antarctica was $-25^{\circ} \mathrm{F}$ and the average winter temperature was $-56^{\circ} \mathrm{F}$ . How much higher was the summer average temperature?

Find the quotient. Simplify. - $(-6) \div(-1)$

Add. Do not use a number line except as a check. - $-\frac{2}{5}+\frac{1}{15}$

Solve the problem. -A sleeping bag is good for temperatures down to $-15^{\circ} \mathrm{F}$ . Should this sleeping bag be used if the temperature is $-28^{\circ} \mathrm{F}$ ?

Find the sum. - $-2.7+(-2.4)$

Arrange the numbers from smallest to largest. - $-7.7,-7 \frac{1}{2},-9,-7.6$

Solve. Express your answer as a signed number. -In 4 days, the value of a share of stock dropped by 26 points. What was the average daily change in value?

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Exam 7: Signed Numbers

Find the sum. - −8.1+(−7.4)-8.1+(-7.4)−8.1+(−7.4)

Perform the indicated operation or operations. - (−75)(85)\left(-\frac{7}{5}\right)\left(\frac{8}{5}\right)(−57​)(58​)

Multiply. -(-1)(11)

Find the quotient. Simplify. - 18÷(−2)18 \div(-2)18÷(−2)

Evaluate. - 13÷(−8)\frac{1}{3} \div(-8)31​÷(−8)

Give a written response. -Can you name a number whose absolute value is 40 ? Explain your answer.

Graph the numbers on the number line. - −4,−2,0,2-4,-2,0,2−4,−2,0,2

Decide if the inequality is correct. - −52<−72-\frac{5}{2}<-\frac{7}{2}−25​<−27​

Add. - (−3.07)+0.57+(−4.03)(-3.07)+0.57+(-4.03)(−3.07)+0.57+(−4.03)

Combine. - −14+7−5+(−16)-14+7-5+(-16)−14+7−5+(−16)

Insert parentheses, if needed, to make the expression on the left equal to the number on the right. - −4+18÷7−20=−18-4+18 \div 7-20=-18−4+18÷7−20=−18

Find the absolute value. - ∣−0.019∣|-0.019|∣−0.019∣

Subtract. - −80−(−59)-80-(-59)−80−(−59)

Solve. -The average summer temperature in the Antarctica was −25∘F-25^{\circ} \mathrm{F}−25∘F and the average winter temperature was −56∘F-56^{\circ} \mathrm{F}−56∘F . How much higher was the summer average temperature?

Find the quotient. Simplify. - (−6)÷(−1)(-6) \div(-1)(−6)÷(−1)

Add. Do not use a number line except as a check. - −25+115-\frac{2}{5}+\frac{1}{15}−52​+151​

Solve the problem. -A sleeping bag is good for temperatures down to −15∘F-15^{\circ} \mathrm{F}−15∘F . Should this sleeping bag be used if the temperature is −28∘F-28^{\circ} \mathrm{F}−28∘F ?

Find the sum. - −2.7+(−2.4)-2.7+(-2.4)−2.7+(−2.4)

Arrange the numbers from smallest to largest. - −7.7,−712,−9,−7.6-7.7,-7 \frac{1}{2},-9,-7.6−7.7,−721​,−9,−7.6