Adding Integers
True or False: The answer to this problem will be POSITIVE.
3 + -7
False. The answer would be -4
What does K C C stand for when subtracting integers?
Keep Change Change
When multiplying, if we have a negative number times a positive number our answer will be _________.
Negative
-10/2
TRUE. The answer is -5.
Sophia has a bank balance of $-15. Since she is in the negative, she deposits $30 into her account. How much money does she have in her account after her deposit?
$15
Solve.
-9 + -27
-36
Solve.
-4 - 5
-9
Solve.
-6 x -2
12
If we divide two negative numbers, our answer will be ___________.
Positive
Scientists are spending 3 days in the ocean looking for a ship that sunk. They are currently at a depth of -200 feet below sea level. They decide to go down 40 more feet. What is their depth now?
-240 feet below sea level
True or False: When adding integers with different signs, we add like normal and keep the sign of the larger number.
FALSE. When adding integers with the SAME signs, we add like normal and keep the sign of the larger number.
Solve.
12 - 7
5
-25 x 9
-225
Solve.
-80/-10
8
Mrs. Friel ordered new markers for her students to use. Unfortunately 4 markers in each box were defective, so she had to throw them away. If there were 12 boxes, how many defective markers were there?
48 defective markers
Solve.
-12+15
3
True or False:
For the problem -4 - 8 it would change to 4 + 8 and the answer would be 12.
False. The problem would change to -4 + -8 and the answer would be -12.
Solve.
170 x 4
680
Solve.
-240/2
-120
George loves to hike. On his way home he calculated that he descended -480 feet over 8 hours. On average, how many feet did he descend per hour?
-60 feet per hour
Solve.
-431 + 903
472
Solve.
-913 - -504
-409
Solve.
-140 X -25
3500
Solve.
1500/50
30
On Monday morning it was 60 degrees outside. By the afternoon it dropped 8 degrees, but then rose another 4 by 5:30. What was the temperature at 5:30?
56 degrees