Hey nerds! This is the answer key 7th grade math test, Add and subtract rational numbers unit test. hopes this helps!

Question

1.Abraham needs one-half of a point to get an A– in Math. What rational number can be used to represent the number of points needed for Abraham to get an A–?
Answer, 1/2

2.Place the following numbers in order as they would appear on a number line, left to right: −2.0 , 0.25, −1.02 , 1.98.
Answer, -2.0, -1.02, 0.25, 1.98

3.Find the sum of p
and q if p=34 and q=−114 . Reduce your answer to lowest terms.
Answer, -2

4.Add (−12)and (−15).
Answer, -27

5.Add 10.82+(−15.96).
Answer, 10.82+(-15.96)=-5.14

6.Which of the following is a real-world problem that could be solved with the sum 102.50+(−39.95)
?
Answer, Nevaeh earned $102.50 last weekend. He then spent $39.95 on a new game. How much money from his weekend earnings does he have left?

7.Solve the following problem:
It was 13°C yesterday, but the temperature changed by −18.6° overnight. What is the temperature now?
Answer, -5.6

8.Use the additive inverse to find −492.89−(−871.78)
Answer, 378.89

9.Determine the distance between −18.26
and −2.45 on a number line.
Answer, 15.81

10.Subtract 24−(−15)
Answer, 39

11.What is 1749 + 59 − 8 − 10?
Answer, 0

12.Which context describes a difference of rational numbers?
Answer,A football player loses yards on a play.

13.Joey walked east for 1523
meters from home. Then, he walked west for 2134
meters. How far was Joey from home? Write your answer as a mixed number only.
Answer, joey was 6 1/12 meters from home.

14.Which situation describes opposite quantities that when combined would equal 0?
Answer,A plane ascends to 15,000 feet and then descends 15,000 feet. How many feet above the ground is the plane?

15.Solve the following word problem. The air temperature at 9 a.m. is −5.8 degrees Celsius. The air temperature at noon is −1.6 degrees Celsius. What is the change in the temperature during these three hours? Write and solve an equation to show your answer. Then explain what your answer means.
Answer, -5.8-(-1.6)=-4.2
Then explain what that answer means.

Hope this helps nerds!!

Answer 1

This answer key provides the correct answers and explanations for an Add and Subtract Rational Numbers Unit Test for 7th grade math. The key includes solutions for various problems such as finding the sum, subtracting rational numbers, determining the distance on a number line, finding the change in temperature, and identifying real-world problems that can be solved using rational numbers. It also includes example contexts and situations to help students understand the concepts better. Overall, this answer key is helpful for students studying this particular unit in 7th grade math.