PreAlgebra Unit 1 Review

Front

Classify the number -23.

Back

-23 is a rational number and an integer.

Front

Convert 0.36 to a fraction in simplest form.

Back

0.36 = \frac{9}{25}.

Front

In scientific notation, if the exponent is a positive number, what does it indicate about the original number?

Back

A positive exponent indicates that the original number was a really big number.

Front

Calculate the mean absolute deviation of the following numbers: 22, 25, 15, 28.

Back

The mean absolute deviation is 4.

Front

Which is larger: 87% or 8.7 x 10^{-3}?

Back

87% is larger than 8.7 x 10^{-3}.

Front

What is a rational number?

Back

A rational number is any number that can be expressed as the quotient or fraction of two integers.

Front

What is an integer?

Back

An integer is a whole number that can be positive, negative, or zero.

Front

How do you convert a decimal to a fraction?

Back

To convert a decimal to a fraction, write the decimal over its place value and simplify.

Front

What does scientific notation represent?

Back

Scientific notation is a way to express very large or very small numbers using powers of ten.

Front

What is the formula for calculating mean absolute deviation?

Back

Mean Absolute Deviation = \frac{\sum |x_i - \bar{x}|}{n}, where \bar{x} is the mean.