Adding Integers
A scuba diver is swimming at –18 metres below sea level. She rises 7 metres, then dives another 5 metres.
What is her final position relative to sea level?
-18 + 7 - 5 = -16
The temperature in Winnipeg was –8°C in the morning. By the afternoon, the temperature increased by 13°C.
-8 + 13 = 5
The temperature dropped by 48°C over a period of 6 hours. If the temperature changed by the same amount each hour, what is the quotient of the total temperature change divided by the number of hours?
-48 \ 6 = -8
What is the difference between adding two negative integers VS multiplying two negative integers
adding two negative integers = answer becomes more negative
multiplying = two negatives make a positive
Ethan owes his friend $12.
He continues to borrow $8 every week for 5 weeks. Represent his total debt using an integer and determine how much he owes after 5 weeks, including his original debt.
-12 + (-8 x 5)
= -12 + (-40)
= -52
represent -10 + 5 with integers tiles
= -5
5 negative tiles
Show -10 - (-3) with integer tiles
10 negative tiles.
Take away 3 negative tiles
Answer is -7
(-6 + (-18)) \ 3
-24 \ 3
= -8
A mountain climber begins at an elevation of 250 metres.
She descends 35 metres per hour for 4 hours.
She then climbs up 60 metres, but later descends another 25 metres.
What is her final elevation?
250 + (-35 x 4) + 60 - 25
(= 250 - 140 + 60 - 25)
(= 145)