Arlene is showing her work in simplifying - 7.9 + 8.2 - 3.4 + 2.1. Identify any errors in her work or in her reasoning. Write feedback to Arlene explaining the mistake she made and how to correct her work.
-7.9 + 8.2 - 3.4 + 2.1
(Original problem)
-7.9 + 8.2 + (-3.4) + 2.1
(Additive inverse)
-7.9 + (-3.4) + 8.2 + 2.1
(Associative property)
(-7.9 + (-3.4)) + (8.2 + 2.1) (Commutative property)
-11.3 + 10.3 (Simplify)
-1 (Simplify)
Answers (1)
Know the Answer?
Not Sure About the Answer?
Find an answer to your question ✅ “Arlene is showing her work in simplifying - 7.9 + 8.2 - 3.4 + 2.1. Identify any errors in her work or in her reasoning. Write feedback to ...” in 📘 Mathematics if you're in doubt about the correctness of the answers or there's no answer, then try to use the smart search and find answers to the similar questions.
Search for Other Answers
You Might be Interested in
Translate the expression 5x-7
Answers (2)
Suppose you are given an array of sorted integers that has been circularly shifted k positions to the right. For example taking (1 3 4 5 7) and circularly shifting it 2 position to the right you get (5 7 1 3 4).
Answers (2)
The table shows the price for different numbers of pudding cups: Number of Pudding Cups Price (in dollars) 2 6 4 12 6 18 8 24 Does this table of numbers represent a proportional relationship?
Answers (1)
How do you write 145,934 in scientific notation
Answers (1)
A 4 feet tall baby elephant standing next to a man cast of 6 feet shadow is the man cast a shadow that is 9 feet long and how tall is he
Answers (1)
New Questions in Mathematics
A bus went 240 km farther than a car. The car went one-fourth the distance of the bus. How far did each vehicle travel? Choices for the car: 60,80,100
Answers (1)
A rectangle has an area of 100 cm². The base of the rectangle is 25 cm. What is the height of the rectangle? A) 4 cm b) 10 cm c) 76 cm D) 2400 cm
Answers (1)
The table shows the results of a survey of 200 movie rental customers: Comedy---> 15% Mystery---> 10% Horror---> 46% Science fiction - - - > 29% How many customers prefer horror movies?
Answers (2)
Keith's high school played 4 football games this year, 2 of the games were played at night. He attended 3 games. How many football games did Keith miss?
Answers (1)
A bus traveling at an average rate of 30 miles per hour left the city at 11:45 a. m. A car following the bus at 45 miles per hour left the city at noon. At what time did the car catch up with the bus
Answers (1)