Mathematical Operations and Conversions

Question 1

(-3.2) - 0.9 \div [0.7 - (-1.2)]^2 is about - 3.4

Accepted Answer

True

Question 2

One day in Black Lake, the max temperature was -8.1°C and the min temperature was -16.7℃. a) The mean temperature is:

Accepted Answer

-12.4°C

Question 3

\frac{3}{5}	imes0.5

Accepted Answer

3/10, 0.3

Question 4

Write the rational number as a decimal: 4 1/6

Accepted Answer

4.16667

Question 5

\left((-0.2ight)	imes x=0.75 What is the value of x?

Accepted Answer

-3.75

Question 6

Is √7 rational or irrational?

Accepted Answer

irrational

Question 7

Is the √25 Rational or Irrational?

Accepted Answer

Rational

Question 8

(-0.8)+1.2\div(-0.3)	imes1.5

Accepted Answer

-6.8

Question 9

Which number is NOT rational?

Accepted Answer

\sqrt{6}

Question 10

To convert Celsius to Fahrenheit you can use the formula: C = \frac{5}{9}\left(F-32\right)So 50ºF is 9ºC.

Accepted Answer

False

Question 11

\frac{23.7-(-5.6)\div0.7+6.8}{(-3)	imes(-6.7)+3.5}

Accepted Answer

1.63

Question 12

Why is the √5 Rational

Accepted Answer

It is irrational because it is not a perfect square.

Question 13

\frac{5}{9}\div\left(-\frac{3}{2}\right) =

Accepted Answer

- 10/27

Question 14

What is a Rational Number?

Accepted Answer

Any number that can be written as a fraction.

Question 15

3.65\div\left(-0.5\right)

Accepted Answer

-7.3, -7 \frac{3}{10}

Question 16

Is 7.121212121212 Rational or Irrational?

Accepted Answer

Rational

Question 17

\left(-8.2\right)-\left(-2.4\right)

Accepted Answer

-5.8

Questions 17