Adding Integers
what's the rule for adding integers that have different signs?
subtract & take the sign of the larger #
what's the rule for subtracting integers?
BONUS POINTS IF YOU CAN SPECIFY WHAT EXACTLY HAPPENS IN EACH STEP!
keep, change, change
keep the 1st #, - becomes +, change the 2nd #'s sign
A football team gained 6 yards and then lost 10 yards. Where is the football team now?
-4 yards
negative x negative = _______?
positive
positive ÷ negative = ________?
negative
15 + (-101)
-86
-16 - 37
-53
A test has 20 questions. The test awards 3 points if the answer is correct and takes away 1 point if the answer is incorrect. A student answered 5 questions incorrectly. How many points did the student lose?
-5 points / 5 points lost
-3 x 14
-42
-135 ÷ -9
-13 + 18 - 5
0
200 - (-34)
234
Sylvia checked the balance in her bank account early in the morning and saw that she had 98 dollars. In the afternoon, she noticed that there was an overdraft of 6 dollars in the account for unpaid bills. How much were the unpaid bills?
$104
9 x -12 + 46
-62
82 ÷ -2 x 5
-205
-98 + 65 + -27 - 154
-214
-231 - (-904) + 11
684
The price of one share of a stock fell 4 dollars each day for 8 days. How much value did one share of the stock lose after 8 days?
-$32
10 x -5 - 10
0 x -5
0
what did I do wrong?
I subtracted first, then multiplied.
multiply first, then subtract
-60 ÷ 20 ☐ 288 ÷ -96
A submarine at 21 feet below sea level suddenly moves up about 6 feet. At what depth is the submarine located now?
-15ft / 15ft below sea level
The record high temperature for Massachusetts is 104 degrees Fahrenheit. The record low is -18 degrees Fahrenheit. What is the difference between high and low?
122° difference
A penalty in Meteor-Mania is -5 seconds. A penalty in Cosmic Calamity is -7 seconds. Yolanda had penalties totaling -25 seconds in a game of Meteor-Mania and -35 seconds in a game of Cosmic Calamity. In which game did Yolanda receive more penalties ?
neither! it was the same number of penalties
From sea level, a submarine descends 40 feet per minute. Where is the submarine in relation to sea level 5 minutes after it starts descending?
-200ft / 200ft below sea level
A certain reality TV show lost a total of 9,000 viewers over the past 3 months. It lost the same number of viewers each month. How many viewers did it lose each month?
-3,000 viewers