Adding Rational Numbers
3.15 + 2.25
5.40
8/11 - 3/11
5/11
5(3)
15
-15 divided by -5
1/2 divided by 2/4
1
1 + (-3)
-2
- 4 - 8
-12
-4(6)
-24
-20 divided by 2
-10
The record low temperature in Minneapolis, MN is -34°F. The record high is 108°F. What is the difference between the record high and the record low temperatures?
142 degrees F
9 + (-18)
-9
-3 - (-10)
7
-1/6 (-2/3)
1/9
1/4 divided by 3/8 (Simplify your answer)
2/3
A homeowners’ association charges a $2 fee for each day your payment is late. If a bill was originally $75 and paid 5 days late, then how much is owed to the homeowners’ association?
$85
-5 + 8
3
-8.5 - (-3.5)
-5
-2(-4)
8
-100 divided by 10
-10
List all the properties for adding and subtracting positives and negatives.
Add: Signs same, add and keep sign. Signs different, keep change change... subtract the numbers and keep the sign of the bigger number.
Subtraction - K C C.
To make a small amount of play dough, you can mix 1 cup of flour, 1/2 cup of salt and 1/2 cup of water. What is the total amount of ingredients added to make the play dough?
2 cups
The snowfall in Rochester, NY in the winter of 1999-2000 was 91 inches. Normal snowfall is about 76 inches per winter. How much more snow fell in the winter of 1999-2000 than is normal?
15 inches
Joe had a breakfast party. He invited 4 of his best friends. Each friend brought 3 cups of coffee. How much coffee did they all bring together?
12 cups
Emma bought 2 yards of ribbon to make bows for 4 of her friends. How much yard will she use for each ribbon?
1/2 yards
List all the properties for dividing and multiplying positives and negatives?
Multiply/Divide: Same sign: Answer is positive Different sign: Answer is negative