Unit 2 Test Numbers & Operations
Quiz
•
Mathematics
•
7th Grade
•
Practice Problem
•
Hard
Anthony Grippo
Used 8+ times
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15 questions
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1.
MULTIPLE CHOICE QUESTION
3 mins • 4 pts
Todd's team starts a football game. On the first play, they gain 6 yards. On the second play, they lose 12 yards. The expression 6+(-12) represents this situation.
What was the total yardage that was gained or lost?
Hint: Solve the equation of 6 + (-12). If it is a positive number, they gained and negative number lost.
6 yards gained
-6 yards lost
8 yards gained
-8 yards lost
Answer explanation
6 + (-12) means that you are taking 6 - 12. If you look at this on a number line, starting from +6 you will go left 12 as it is a negative number. The end result is -6.
2.
MULTIPLE CHOICE QUESTION
3 mins • 4 pts
What is the sum of -18 and -27?
Hint: What does sum mean you do with the equation.
-45
-9
9
45
Answer explanation
-18-27 means that your number will remain a negative for the solution. Add the two numbers together and you get 45.
3.
MULTIPLE CHOICE QUESTION
3 mins • 4 pts
Peyton says the sum of two numbers can never be zero. Explain why Peyton's reasoning is incorrect.
Answer explanation
Additive inverse is basically considering the opposite. If you were to have a positive 7 and a negative 7, that would equal to zero.
7 - 7 = 0
Think of it as you had 7 cookies, you ate those 7 cookies, you were then left with 0 cookies.
4.
OPEN ENDED QUESTION
3 mins • 4 pts
In lesson 8-4, problem 10 asked that you create a word problem that you can solve by adding a positive and a negative number. You are to write an example of a word problem using a positive and negative number.
Below is an example, you cannot use this.
Alvii went trick-o-treating and got 45 candy bars. She then consumes 32 of those candy bars. How many bars are left for sharing?
It is taking the positive number, negative number and creating an equation to solve.
Evaluate responses using AI:
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Answer explanation
You can create any word problem as long as it is using a positive and negative number. It doesn't have to be overly complicated.
5.
MULTIPLE CHOICE QUESTION
3 mins • 4 pts
Which value of x makes the following statement true?
1.4 - x = a positive number
x = 1.6
x = 2.4
x = -1.4
x = 1.4
Answer explanation
If you plug in -1.4 into the equation, you get
1.4 - (-1.4) =
If you recall that subtracting a negative number means that you add.
1.4 + 1.4 = 2.8
That gives the answer as a positive statement.
6.
MULTIPLE CHOICE QUESTION
3 mins • 4 pts
A fish is 12.4 m below the surface of the ocean. The fish swims down 3.2 m. Then it swims up 9.8 m. What is the fish's new position relative to the surface of the ocean?
-1.4 m
6.6 m
15.8 m
-5.8 m
Answer explanation
Looking at it in equation form
-12.4 - 3.2 + 9.8
The fish started at 12.4, going down or left on a number line is considered negative, going up or to the right is considered positive.
7.
MULTIPLE SELECT QUESTION
3 mins • 4 pts
Decide if the sum of each expression is positive. Solve the equation to help determine if needed.
There are two choices.
-34 + 89
5.5 + (-5.4)
405 + (-405) + (-3.9)
4 5/8 + (-5 1/8)
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