Classifying Real Numbers
Which of these numbers is a NATURAL number?
a) 2/3
b) -3
c) 7
d) 0
7 is a natural/counting number
Compare using <, >, or =. -5.4 ____ 6.7
-5.4 < 6.7 (Negative numbers are always smaller than positive numbers.)
10+4 x 2 -1
17
Find the square root of 324.
18
Convert 532 from standard form to scientific notation.
5.32 X 102
Which of the following is a whole number?
a) 0.8
b) 1/2
c) -5
d) 15/3
15/3 = 5 ; 5 is a whole number
Compare using <, >, or =. 0.76 _____ 0.2345
0.76 > 0.2345
Simplify 60÷(6+9)-3.
1
Find the negative square root of 16. (-√16)
-4
How do you write 10 X 10 using a base and an exponent?
10 squared or 102 = 100
Which of the following is an integer?
a) -4/9
b) 12
c) 0.67
d) 1/4
12 is an integer. Integers are whole numbers or their opposites.
Compare using <, >, or =. 4/5 _____ 0.80
4/5 = 0.80
A submarine is located at 400 meters below sea level. If the submarine ascends 125 meters, what is its current location?
-400 + 125 = -275 meters
If t2= 81, then t must = ?
9 or -9
Convert 0.092 from standard form to scientific notation.
9.2 X 10-2
Why is "Pi" an irrational number?
"Pi" is an irrational number because its decimal goes on forever and never repeats. Also, it cannot be written as a fraction.
Order the following numbers from least to greatest: 1/2, 0.12, -8, 0, -1.3
-8, -1.3, 0, 0.12, 1/2
(8 x 7) ÷ 14 - 1
3
If x2 = 289, then x must = ?
17 or -17
What is 10-3 equal to?
1/10 x 10 x 10, 1/1000 or 0.001
Is the square root of 13 a rational or irrational number? How do you know?
The square root of 13 is an irrational number because it is equal to 3.605551275... It never ends and has no pattern.
Order these numbers from greatest to least: 3.9, -4, 1.22, 1/4, -12
3.9, 1.22, 0.25, -4, -12
20 - [4(3 +2)]
The square root of 125 is in between which two consecutive numbers?
11 and 12
What is 1/10-6 equivalent to?
1/10 x 10 x 10 x 10 x 10 x 10, 1/1000000 or 0.000001