Real-World Examples
Addition Examples
Subtraction Examples
Rules
Miscellaneous
100
You and your friends ordered a pizza. 1/10 of it is pepperoni, 1/5 is Hawaiian, 1/4 is sausage, and the rest is cheese. What fraction of the pizza is cheese?
9/20 is cheese
100
Add the following:
1/2 + 1/4
3/4
100
Subtract the following:
1/4 - (-1/4)
1/2
100
When adding decimals what do we need to line up?
The decimal points.
The tenths places line up, the hundredths places line up, the thousandths places line up...
100
Negative plus negative =
NEGATIVE
200
Gary bought 2.756 lbs of nails for his project. If Gary uses 1.38 lbs of nails, how many nails does Gary have left?
1.376 lbs
200
Add the following:
-1+0.52
-0.48
200
Subtract the following:
-11/6-(-4/3)
-1/2
200
TRUE OR FALSE: The rules for adding integers are the same as those for adding rational numbers.
TRUE
200
Same signs _______ and ______, Different signs ______________, __________ number gets the _________.
Sames signs add and keep, different signs subtract, bigger number gets the sign.
300
A diver is 13/6 miles below the surface of the water. A second diver is below the other diver by 5/3 miles. How far from the surface of the water is the second diver?
(Hint: Think about direction)
-23/6 miles from the surface of the water.
300
Add the following:
-1/7+2/3
11/21
300
Subtract the following:
-4.8-(-5.008)
0.208
300
What is the first step for adding rational numbers?
Find the LCM of the denominators
300
D: -7+10
400
You are going on a trip and need to buy camping gear. You have $20.00 to spend. If the tent is $9.53, the lantern is $3.23, and the sleeping bag is $6.58. Do you have enough money to buy everything?
Yes
Bonus Points: How much money will be left over?
400
Add the following:
-6.84+0.9
-5.94
400
Subtract the following:
3/4-1 1/5
-9/20
400
How do we change subtraction of integers to addition of integers?
Add-the-opposite
400
What is always true about absolute value?
Always positive
500
If the rate of the stock market is increasing 2/7 units and then the next month the rate is decreasing 6/7 units. What is the difference of the two rates?
8/7 units
500
Add the following:
-2 3/4+5/3
-13/12 = -1 1/12
500
Subtract the following:
-6-4.37
-10.37
500
What is the second step of adding/subtracting rational numbers?
Add/subtract the numerators.
500
What is the additive inverse of -9?
9
Bonus Points: Why is it the additive inverse?