7th Grade
-240 + (-10) = ?
-250
What is the square root of 25?
+ AND - 5
Place in order from least to greatest:
912, -325, 8, -326, -912, -323
-912, -326, -325, -323, 8, 912
Standard Form 9.2 x 10 -6
.0000092
What is the reciprocal of 2/7?
7/2
Place in order from least to greatest:
5, -8, 2, -10, 1, -1
-10, -8, -1, 1, 2, 5
The rules for Scientific Notation
Decimal behind the first nonzero digit and a power of 10
What are the three ways you can multiply with positives and negatives?
+ x - = -
- x + = -
- x - = +
√42 is between what two whole numbers?
Between 6 and 7
What makes a number RATIONAL?
Repeats of Terminates
-2.45 - (-5.783) = ?
3.333
Standard Form from: 2.349 x 106
2,349,000
How do you change a mixed number into an improper fraction?
Multiply the D by the number then add the N and keep the same D.
The area of Argentina is approximately 3 × 107 square kilometers. The area of Venezuela is approximately 3 × 105 square kilometers. Approximately how many times larger is the area of Argentina than the area of Venezuela?
300 times larger
What makes a number IRRATIONAL?
NEVER repeats or terminates
3 1/2 divided by 3/4
12 2/3
How do you know when the answer to Square and Cube Roots its a positive or negative or both?
Square Roots can have both. Cube Roots can only have one at a time.
Sarah purchases 4 theater tickets. The cost of each ticket is $23.50. The theater charges an $8.50 fee per order for shipping and handling. Sarah uses a discount code to save $6 on her entire order of 4 tickets. What is the final cost of Sarah’s purchase?
$96.50
76,090,000 in Scientific Notation
7.609 x 107
Is 1/3 a rational or irrational number? Why?
When changed to a decimal it is repeating.
You are on a boat with a dolphin 25 feet below the surface of the water. How far does the dolphin need to swim for you to pet it?
25 feet
(3.9 x 104) - (2.2 x 103)
3.68 x 104
A helicopter is 80.5 feet in the air hovering over the water. The pilot looks down and sees a shark 25.75 feet below the surface of the water. How far does the pilot need to look to see the shark?
106.25 feet
(3.9 x 103) + (2.2 x 104)
2.59 x 104
Something you should ALWAYS do on any math work for Ms. Proctor
SHOW YOUR WORK