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Adding Integers
Subtracting Integers
Multiplying Integers
Dividing Integers
Word Problems
100
-5+(-4)
-9
100
5-8
-3
100
-30x3
-90
100
0/-4
0
100
A soccer team is having a car wash. The team spent $55 on supplies. They earned $275, including tips. The team's profit is the amount the team made after paying for the supplies. Write a sum of integers that represents the team's profit. Solve.
-55+275=220. The team's profit was $220
200
5+(-21)
-16
200
-5-(-3)
-2
200
15-(4+3)x2
1
200
-30/10
-3
200
When Tom found the difference -11-(-4) he got -15. What might Tom have done wrong?
Tom found -11-4 instead of -11-(-4). To subtract -4, he should add the opposite of -4: -11+(4)=-7
300
How do you add integers with the same sign?
Add their absolute values. Use the sign of the integers as the sign of the sum.
300
Explain how to use the number line to subtract integers.
Change the subtraction to add the opposite. Then start at the initial (the first number in the expression) move left if the second number is negative, right if the second number is positive.
300
When will a product be positive?
When you have an even number of negatives.
300
When will the quotient be negative?
When you have an odd number of negatives.
300
Adam is scuba diving. He descends 5 feet below sea level. He descends the same distance 4 more times. What is Adam's final elevation?
5(-5)=-25 feet. Adam is 25 feet below sea level.
400
How do you add integers with different signs?
Add their absolute values. The sign of the sum will be the sign of the number with the greater absolute value.
400
A a positive minus a negative is...
positive
400
When will a product be negative?
When you have an odd number of negatives.
400
When will the quotient be positive?
When you have an even number of negatives.
400
Walter buys a bus pass for $30. Every time he rides the bus, money is deducted from the value of the pass. He rode 12 times and $24 was deducted from the value of the pass. How much does each bus ride cost?
24/12=2; each ride costs $2
500
7+8+(-9)+10+(-30)
-14
500
8-9-(-10)-24-(-30)
15
500
4(-20) + (-200)(-6)=
1120
500
2013/0
undefined
500
Lisa is standing on a dock beside a lake. She drops a rock from her hand into the lake. After the rock hits the surface of the lake, the rock's distance from the lake's surface changes at a rate of -5 inches per second. If Lisa holds her hand 5 feet above the lake's surface, how far from Lisa's hand is the rock 4 seconds after it hits the surface?
80 inches