Rational or Irrational
Is the following number rational or irrational?
sqrt7
Irrational; you can tell because the decimal equivalent (2.645751...) doesn't terminate or repeat.
Give a decimal approximation of the following number, to the nearest tenth:
sqrt27
sqrt27~~5.2
Which is greater?
pi or sqrt8
pi>sqrt8
Write the following in standard form:
2.1xx10^5
210,000
Simplify:
24/56
3/7
Is the following number rational or irrational?
9/2
Rational, because it's a fraction
Give a decimal approximation of the following number, to the nearest tenth:
sqrt63
sqrt63~~7.9
Which is greater?
sqrt48 or 7.15
7.15>sqrt48
Write the following in standard form:
8.24xx10^-3
0.00824
Multiply:
4/9*3/5
4/15
Is the following number rational or irrational?
2-pi
Give a decimal approximation of the following number, to the nearest tenth:
sqrt10
sqrt10~~3.16
Which is greater?
53/6 or sqrt82
sqrt82>53/6
Write the following in scientific notation:
7,800,000,000
7.8xx10^9
Divide:
5/6div4/3
5/8
Is the following number rational or irrational?
-9.26
Rational: it's a terminating decimal, so it can be expressed as a fraction:
-926/100=-463/50
Give a decimal approximation of the following number, to the nearest tenth:
sqrt40+sqrt80
sqrt40+sqrt80~~15.3
Which is greater?
5.5 or sqrt30
5.5>sqrt30
Write the following in scientific notation:
0.00000317
3.17xx10^-6
Add:
2/5+3/7
29/35
Is the following number rational or irrational?
7.777777777...
Rational; since it's a repeating decimal, it can be expressed as a fraction:
7 7/9=70/9
Give a decimal approximation of the following number, to the nearest tenth:
pi/3+sqrt50
pi/3+sqrt50~~8.12
Put the following in order from least to greatest:
9.4, 19/2, sqrt80
sqrt80, 9.4, 19/2
Evaluate the following expression. Write your answer in scientific notation:
(3xx10^30)*(4xx10^11)
1.2xx10^42
Simplify:
(-2/5)+(-11/6)-(-3/2)
-11/15