Math Semester Test

6

On a number line, what is the distance between -8 and -2? *

0

Complete the addition equation modeled on the number line. 8+-8

-30

What is (5)(-6)?

a=-5

What is (5)(a)=-25?

-0.7

What is the sum of 2 8/10 + (-3.5) in decimal?

x=-5

Which values of "x" make the statement true? Choose all correct answers. x-5.5=a negative number.

12+-12=0

A fishing hook is at an elevation of −12 m relative to sea level. Half an hour later, the fishing hook's elevation increases by 12 m. Which equation represents this situation?

-13 3/4

A gopher is in a hole that is 6 1/4 in. below the surface of the ground. It then digs 7 1/2 in. deeper. What is the gopher's new elevation relative to the surface of the ground? *

negative

Caroline wants to compare the expressions -15-9 and 9-(-15) to determine which result is greater. How can she do this without finding the value of each difference? Explain your reasoning.

clara is correct

Clara and Tyler are working on an activity in class. Clara says that 17 + (-6) and (-6) + 17 have the same value. Tyler says that 8 + (-8) and (-8) + (-8) have the same value. Who is correct? Explain your reasoning. *

11

During a round of golf, Tim's score on hole eight is −7. After hole eighteen, Tim's score increases by 18. What is Tim's score after hole eighteen?

5+(-5)=0

Hyun is on a game show. Points are added for correct answers and subtracted for incorrect answers. At the end of the second round, he has 5 points. In the third round, he loses 5 points. How many points does Hyun have after the third round?

negative

Is (-2)(-6)(1) a positive or a negative? *

negative

Is (-4)(17)(-2)(-1) a positive or a negative?

positive

Is (-5)(4)(-13)(2) a positive or a negative? *

negative

Is the sum of (-41)+22 positive or negative?

negative

Is 〖(-1)〗^3=(-1)(-1)(-1) a positive or a negative?

false

Javier says that when you add a positive and a negative number, the sum is always negative. Is Javier's statement true or false? Explain your reasoning. *

15.1

Jeremy is digging a hole. The bottom of the hole is -2.8 feet from the top of the hole. Sanjay is on a deck that is 12.3 feet above top of the hole. How many feet apart are Sanjay and the bottom of the hole? *

6.45

Jose flies a kite 171/2 feet above the ground. He increases its elevation by 4 3/4 feet by letting out some string. Then he reels in the string and changes its elevation by -15.8 ft. After Jose reels in the string, what is the kite's elevation relative to the ground?

-4.5

Michelle is playing a board game. At the end of the first round, she has −2.3 points. During the second round, she gains 4.5 points. During the third round, she loses 6.7 points. What is Michelle's point value after the third round?

e=-3 f=5 g=-2

Serafina is solving a number puzzle that involves three integers, e, f, and g, where e is a -3. The product of e and f is −15. The product of e and g is 6. The product of f and g is −10. What are the values of e, f and g? *

Absolute Value of -2-(-7)

The distance between -2 and -7 is 5. Which statement represents the distance?

True

The distance between zero and an integer is known as absolute value. It is always a positive number.

Absolute value of -5-9

The temperature changes from 9°F to −5°F. Which of the following expressions model the distance on the thermometer between 9°F and −5°F? Choose all the correct answers.

6

What is 2 2/3-(-3 2/6) ?

33.5

What is 33 1/2 written as a decimal?

40 1/3

What is 40 3/9 reduced?

left

Which direction do you move on a number line for 5-4?

-3

Which is greater: -3 or -20? *

40+(-63) is less

Which is less: (-25) + 12 or 40 + (-63)?

-3 and 6

Complete each multiplication equation with an integer. Write your answers in the blanks. (4)(_____________)=-12 and (-2)(_____________)=-12

Both are correct

Josh says that (4)(-7)(-1) is equal to (4)(7). Evangelina says (4)(-7)(-1) is equal to (-28)(-1). Who is correct? Explain your reasoning.

she is incorrect

Layla says that -3(5)=15. Which statement explains why Layla is correct or incorrect?

-25, -15, -5, 0, 10

Put these in correct order of least to greatest: -5, -15, 0, 10, -25.

-49

What is the sum of −16 and −33?

-52

What is the sum of −38 and −14?

positive

Without calculating, explain how you can tell if the value of the expression (-2.37)-(-7.91)-(-2.45) is positive or negative. Explain your reasoning.