Rational Numbers

Faith Williams




My Numbers
.85
-7
3
-1/3



Compare and Contrast
.85 < 3
.85 > -7
.85 > -1/3
-7 < 3
-7 < -1/3
3 > -1/3



Least to greatest
-7, -1/3, .85, 3



Absolute value

1. |8.5|-.5=.80
2. |-7|+20=27
3. |3|x10=30
4. |-1/3|+1/3=2/6

Explanation:
Absolute value is the distance
away from zero.





Operations with integers


Addition:
1. 32+58=90
2. -40+10=-30

Subtraction:
1. 80-60=20
2. -70-50=-120 (KCC)

Multiplication:
1. -20x-10=200
2. 5x-11=-55

Division:
1. 24/3=8
2. 64/-8=-8



Real Life math problems

1. I have 34 jelly beans I ate one for
lunch and then found three more. How
many jelly beans will I have?
Solution: 34-1+3=36
36 jelly beans

2. A submarine is -250 feet under water, if
he travels -10 feet a minute how long did it take him to get to -500 feet?
Solution: 500-250/10=25
25 minutes

3. If I have $400 and write a check out for $50,
then find .25 under the couch. How much money
will I end up with if I buy a scooter for $80?
Solution: $400-$50+.25-$80=$270.25
$270.25




Order on a Number Line