Adding
Mia lost 7 points in a video game but then gained 10 points. Her total point change is
-7 + 10=3
If you climb 10 steps up and then descend 15 steps, your new position is at _____________ steps.
10-15=-5
Sarah lost 4 points each day for 7 days. What is her total point change?
-28
A phone battery loses −48 percent of its charge over 8 hours. What is the average percent lost per hour?
−48÷8=−6
The phone loses −6 percent charge per hour.
When you subtract a positive number from a negative number, your answer will be
negative
If your bank account had −10 dollars and you deposited +20 dollars, what is your new balance?
−10+20=10
If you have −8 dollars and you subtract −12 dollars, what is your new balance?
If the temperature drops 2 degrees each hour for 5 hours, what is the total temperature change?
=-10 degrees
-2*5 =-10 degrees
A worker’s salary decreased by−600 dollars over 12 months. What is the average monthly pay cut?
−600÷12=−50
The pay cut is −50 dollars per month.
When you multiply two negative integers, the product is
positive
The temperature is +8 degrees in the morning. It drops by −11 degrees at night. What is the new temperature? Show your work.
If the temperature is +8 degrees and it drops by −11 degrees, the new temperature is −3 degrees because 8+(−11)=−3.
Imagine you are playing a video game where gaining points is positive and losing points is negative. If you start with −22 points and your score increases by 35 points, what is your new score?
The new score is −22+35=13
A mountain climber is descending a mountain. Every hour, she climbs down −30 meters (the negative sign means she is going down). If she descends for 4 hours, how far will she have gone down in total?
−30×4=−120
An elevator descends −72 feet over 12 floors. How far does it go down per floor?
−72÷12=−6
The elevator goes down −6 feet per floor.
When you add integers of the same sign the results are?
Positive
If you spend −15 dollars on lunch and get +10 dollars for doing chores, what is your total change in money? Explain your thinking.
Spending −15−15 dollars and getting +10+10 dollars means my total change is −5−5 dollars because −15+10=−5−15+10=−5.
A submarine descends from −20 meters to −75 meters. What is the change in depth?
Calculation: −75−(−20)=−75+20=−55
A farmer loses 18 chickens each month for 4 months. How many chickens did the farmer lose in total?
-18* 4=-72
Four roommates split a total bill of −80 dollars (a debt). How much does each roommate owe?
−80÷4=−20
Each roommate owes −20 dollars.
Create and solve your own subtraction problem.
Show your work
A diver is −15 meters underwater. If she descends (goes down) −10 more meters, what is her new depth?
(−15+(−10)=−25
You owe your friend −48 dollars, and you pay back −17dollars (subtracting a negative). What is your new balance?
Calculation: −48−(−17)=−48+17=−31
Marcus has a bank account. Every month, his bank charges him a fee of −25 dollars (this means he loses 25 dollars each month). After 6 months, how much money has Marcus lost due to the fees?
A city records a total loss of −24 inches of snow over 3 weeks (it melted). How much snow melted each week?
−24÷3=−8
−8 inches of snow melted each week.
If you have a total debt of −600 dollars, and you pay it off in payments of −100 dollars each (each payment reduces your debt by −100), the number of payments is: