Lesson 6
7x-6=
-42
-2.3x2.675987695039 will be a negative or positive?
Negative
20/-5=
-4
-8.9999999999999/-7.88888888888 will be a
positive.
In the problem.....
Leonel has 32 cookies and then buys 56 more. How many would he have?
You would use.............
Addition
-8x9=
-72
1/2 x -3/4=
-3/8
-60/12=
-5
1/2 / -3/4=
-4/6= -2/3
In the problem...
Jenny has 32 dollars in the bank and then gets paid 32 more dollars. If you withdrawals all of it and splits it between 8 people, how much do they each get?
Which two operations do you need to use?
Addition and division.
-5x-6=
30
2.5x-5.5=
-13.75
-80/-20=
4
What is the absolute value of -87?
87
What operation is required by the words....
difference, less than, take away, how many more?
Subtraction.
Rashawn and Jessie are playing a game where they lose points for each incorrect answer. Rashawn answers two 3-point questions incorrectly, and Jessie answers four 2-point questions incorrectly. If neither player has answered a question correctly, who is ahead? Explain.
Rashawn, he has -6 points while Jessie has -8 points.
An airplane descends at a rate of 2,700 feet per minute. Once the airplane starts its descent, what will be its change in elevation after 3 1/2 minutes
-9450 feet
Ana is a scuba diver who has completed 5 dives for a total depth of230 feet. Write an equation using integers to represent the average depth of Ana’s dives in relation to the water’s surface.
-230 / 5 = -46
or
46 feet below sea level
A submarine descends at a rate of 2.6 kilometers per hour. If the ocean floor is 6.24 kilometers below sea level, how long will it take the submarine to descend to the ocean floor? Round your answer to the nearest tenth.
2.4 hours.
Kareem heats a beaker of water to a boil. Then he records that the water temperature decreases from 100°C to 19°C in 525 minutes. What was the average change in temperature each minute?
-15 c
In the following will the answers by negative or positive?
-3x3=
-4x-6=
5x-5=
Negative, positive, negative
Jenny has $2.40 deducted from her monthly allowance every time she forgets to do a chore. If she forgets three times in one month, what will be the change in Jenny’s total all
-$7.20
Emilio says 90 / (-9) = 10. Is he correct? Explain.
No, a positive divided by a negative is still a negative.
Regina spent $45.50 over 6 1/2 months on music downloads. If she spent the same amount of money each month, how much money did Regina spend per month on music downloads? Write an equation to represent the situation.
$7
or
-45.50 / 6.5= 7
At the beginning of the month, Kimberly had $65.78. Since then, she has received three payments of $32.50 from her baby sitting job. Kimberly’s 2 sisters each helped her babysit once during the month, so Kimberly paid them each $8.75. If Kimberly did not spend any money, how much money does she have now?
$145.78