Adding Integers
3+5
8
9-6
3
3+2
3 positive counters then add 2 positive counters
The temperature in Troy was 10 degrees in the morning and -2 degrees by the end of the day. What was the temperature change?
The temperature dropped 12 degrees, so negative 12.
-14+16
2
-3+4
1
-6-4
-10
-3+4
3 negative counters then add 4 positive counters and make zero pairs. You're left with 1 positive counter.
I owed my friend $5. I earned $7 in chores. How much money did I make after paying back my friend?
$2
-5-(-4)
-1
5+-8
-3
-7-(-2)
-5
-3-5
3 negative counters, make 5 zero pairs, then take away the 5 positives to get -8
I had a balance of -$10 in my bank account and I did a withdrawal of $7. What is my balance?
-$17
The freezer temperature was -3. I left it open after getting ice cream so it rose by 5 degrees. What was the temperature?
2 degrees
-3+-9
-12
-4-8
-12
-4-(-7)
4 negative counters then make 7 zero pairs and take away the negatives you made with the zero pairs. Make 4 zero pairs to get 3.
The temperature in the mountains was -4 at 4am and warmed up to 28 degrees by noon. What is the change?
32 degree temperature change.
6-(-16)
22
-12+14
2
2-(-6)
8
-8+(-5)
start with 8 negative counters then add 5 more negative counters to get -13
The freezer temperature was -3 degrees and the fridge is 32 degrees. What is the difference?
35 degrees difference
How would you show -1+(-8)
Start with 1 negative counter and add 8 more negative counters to get -9