Terms
What is another way of saying a "x to the power 2"?
"x SQUARED"
True or False: 0.125125125... is rational
True because it's repeating.
Find: √100
10
because 10 x 10 =100
True or False: -5 is rational
True
What 2 integers is √40 in between?
6 and 7
√40 is between √36 and √49, which are 6 and 7
When you CUBE a number, how many times do you multiply it by itself?
You multiply it 3 times.
Example: 23 = 2 x 2 x 2
True or False: 0.12... is irrational
False.
It ends so it's rational.
Find: √64.
8
because 8 x 8 = 64
True or False: √5 is rational
False
Estimate √90.
Approximately 8.5
√90 is about halfway between √81 and √100
so √90 is about halfway between 9 and 10
What's another name for the square root symbol?
It's also called a "radical".
True or False: 0.345297132... is rational
False because it does not repeat or end.
Find: ∛64.
4
because 4 x 4 x 4 = 64
True or False: 2π is irrational
True= π (pi) is always irrational
Which number has a square root between 4 and 5?
A. 4.5 B. 9 C. 20 D. 27
C. 20
because √20 is between √16 and √25
True or False: -4.54 is irrational
False. It ends
Find: ∛-8.
-2
because -2 x -2 x -2 = -8
True or False: √25 is irrational
False, because it's 5
Estimate √15.
Approximately 3.8 or 3.9
because √15 is between √9 and √16 but much closer to √16 or 4.
What is 12 + (-5)2 ?
26 because it's 1 + 25
True or False: √10 is irrational.
True.
Estimate ∛10.
It is between ∛8 and ∛27, which are 2 and 3.
So approximately 2.2 because 10 is closer to 8.