UNIT 3 FLASHCARD - TAKE 2

Front

What is a perfect square?

Back

A perfect square is a number that can be expressed as the square of an integer. For example, 81 is a perfect square because it is equal to 9^2.

Front

How do you express a number in scientific notation?

Back

To express a number in scientific notation, you write it as a product of a number between 1 and 10 and a power of 10. For example, 0.000047 is expressed as 4.7 x 10^-5.

Front

Order the following numbers from least to greatest: 0.5, \frac{2}{3}, 0.67, \frac{3}{5}.

Back

The correct order is 0.5, \frac{3}{5}, \frac{2}{3}, 0.67.

Front

How do you compare numbers in scientific notation?

Back

To compare numbers in scientific notation, compare the coefficients first. If the coefficients are equal, compare the exponents. For example, 5.6 x 10^{-3} < 7.8 x 10^{-2}.

Front

What is scientific notation?

Back

Scientific notation is a way of expressing very large or very small numbers in the form a x 10^n, where 1 ≤ a < 10 and n is an integer.

Front

Convert 12,000,000 to scientific notation.

Back

12,000,000 in scientific notation is 1.2 x 10^7.

Front

What is the square root of 81?

Back

The square root of 81 is 9.

Front

How do you convert a fraction to a decimal?

Back

To convert a fraction to a decimal, divide the numerator by the denominator. For example, \frac{2}{3} = 0.67.

Front

What is the value of 10^0?

Back

10^0 = 1.

Front

How do you add numbers in scientific notation?

Back

To add numbers in scientific notation, they must have the same exponent. If they do not, convert one number to have the same exponent as the other before adding.