Vocabulary
Absolute Value
What is the distance of a number from Zero
Zoey saves $14 and then Spends $14. How much money does zoey have now? Write an expression to solve.
$0.00
$14-14=$0
$14 + (-$14)= $0
30 + 72
102
12-7
5
4 1/2 + 5 1/2
10
Terminating Decimal
What is a decimal that ends in Zero.
Savannah says that 7.22 is a terminating decimal. Jerry says the 7.22 is a repeating decimal. Who is correct and why?
Savannah is correct.
7.22 is a terminating decimal, and can be written as
7 22/100.
9 + (-8)
1
-14 - 8
-22
-4 1/2 + 3 1/4
-1 1/4
Repeating Decimal
What is a decimal that repeats the same numbers indefinitely.
The temperature in late after noon was 63°F. It dropped 5° by evening and then dropped another 6° by midnight. What was the temperature at midnight?
52°F
Show work- 63°-5°=58° 58°-6°=52°
Addition Expression- 63°+ (-5°) + (-6°)
(-5) + (-4)
-9
-8 - (-4)
-4
8 3/4 or 8.75
Show work-
-7.5 + 16.25
16.25 - 7.5= 8.75
Additive Inverses
What are two numbers whose sum is zero.
Ex: 14 and -14
Micheal borrows $7.50 from a friend to buy a book ate the book store. Then he borrows $3.00 from his sister to buy lunch. Using negative numbers write an addition equation to express Micheal's total debt for the day.
(-$7.50) + (-$3.00) = -$10.50
Micheal owes his friend and sister a total of $10.50
32 + (-12)
20
-27 - (-32)
5
-3.75 - (-6.35)
2.6
rewrite- -3.75 -(-6.35)
-3.75 + 6.35
6.35 -3.75 = 2.6
Rational Numbers
What are whole numbers and fractions?
Any number that can be expressed as a fraction; this includes any positive or negative whole number, fraction, decimal, or mixed number.
Ex: 2 -9 -14.6 2/7
Sara is walking up a hill at 90 1/2 ft above sea level. Her friend Zachary is at the base of the hill, which is 13.75 ft below sea level. What is the distance between Sara and her fiend Zachary?
104 1/4 ft or 104.25 ft
90.5+ 13.25= 104.25
-37 + 12
-20
90- (-54)
144
-24 1/2 +16.15 -4
-12.35