Unit 1: Real Numbers Review (TEKS: 8.2A, 8.2B, 8.2C 8.2D)

Front

What are real numbers?

Back

Real numbers include all the numbers on the number line, including rational numbers (like integers and fractions) and irrational numbers (like square roots of non-perfect squares).

Front

How do you convert a number to scientific notation?

Back

To convert to scientific notation, move the decimal point in the number until only one non-zero digit remains to the left. Count the number of places moved; this becomes the exponent of 10. For example, 123000 becomes 1.23 x 10^5.

Front

What is the square root of 99?

Back

Front

Back

Front

How do you express 123000 in scientific notation?

Back

123000 can be expressed as 1.23 x 10^5 in scientific notation.

Front

What is the value of 4.267 x 10^7?

Back

4.267 x 10^7 is equal to 42670000.

Front

What is the difference between rational and irrational numbers?

Back

Rational numbers can be expressed as a fraction of two integers, while irrational numbers cannot be expressed as a simple fraction (e.g., pi, square roots of non-perfect squares).

Front

How do you order numbers in decreasing order?

Back

To order numbers in decreasing order, list them from the largest to the smallest value.

Front

What is scientific notation?

Back

Scientific notation is a way of expressing numbers that are too large or too small to be conveniently written in decimal form, using powers of ten.

Front

What is the exponent in scientific notation?

Back

The exponent in scientific notation indicates how many places the decimal point has been moved. A positive exponent means the number is greater than 1, while a negative exponent means it is less than 1.