Question

PRACTICE QUESTIONS - Add and Subtract Rational Numbers

Question Id : 501070

Answer 1

[AI-generated answer — Bot GPT 3.5]

Find the sum or difference.

1. 2 + (-5)
2. -4 + 3
3. -7 + (-9)
4. 9 + (-2)
5. 4 - (-5)
6. -6 - 3
7. 8 - (-10)
8. -1 - (-3)

Answer 2

75.5 − 32.55

Answer 3

[AI-generated answer — Bot GPT 3.5]

The difference between 75.5 and 32.55 is:

75.5 - 32.55 = 42.95

Answer 4

-3/2 + 8/5

Answer 5

[AI-generated answer — Bot GPT 3.5]

To add the fractions -3/2 and 8/5, we need to find a common denominator.

The common denominator of 2 and 5 is 10.

Converting both fractions to have a denominator of 10:

-3/2 = (-3/2) * (5/5) = -15/10
8/5 = (8/5) * (2/2) = 16/10

Now that both fractions have the same denominator, we can add them:

-15/10 + 16/10 = (-15 + 16)/10 = 1/10

Therefore, -3/2 + 8/5 = 1/10.

Answer 6

Anna is evaluating some rational expressions. Which THREE are correct?

A 152 − 200 = −48
B −25 + (−25) = 0−25 + (−25) = 0
C 89 − (−17) = 10689 − (−17) = 106
D 134 − (−16) = 118134 − (−16) = 118
E −39 − (−28) = −11
−39 − (−28) = −11

Answer 7

[AI-generated answer — Bot GPT 3.5]

The three correct evaluations are:

A) 152 - 200 = -48
B) -25 + (-25) = 0
D) 134 - (-16) = 118

Answer 8

wrong

Answer 9

[AI-generated answer — Bot GPT 3.5]

I apologize for the incorrect response. Let's go through the options again:

A) 152 - 200 = -48: This evaluation is correct.
B) -25 + (-25) = 0: This evaluation is correct.
C) 89 - (-17) = 106: This evaluation is incorrect. The correct evaluation is: 89 - (-17) = 89 + 17 = 106.
D) 134 - (-16) = 118: This evaluation is correct.
E) -39 - (-28) = -11: This evaluation is incorrect. The correct evaluation is: -39 - (-28) = -39 + 28 = -11.

Therefore, the three correct evaluations are:

A) 152 - 200 = -48
B) -25 + (-25) = 0
D) 134 - (-16) = 118

Answer 10

−86.4 + 16.38.

Answer 11

[AI-generated answer — Bot GPT 3.5]

To find the sum of -86.4 and 16.38, we add the two numbers:

-86.4 + 16.38 = -69.02.