MATH 7.3B-SW#1- Rational Numbers and Operations

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, where the denominator is not zero.

Front

Give an example of a rational number.

Back

Examples of rational numbers include 1/2, -3, 0.75, and 4.

Front

What is the sum of two rational numbers?

Back

The sum of two rational numbers is also a rational number. For example, 1/2 + 1/3 = 5/6.

Front

How do you subtract rational numbers?

Back

To subtract rational numbers, find a common denominator, then subtract the numerators. For example, 3/4 - 1/2 = 1/4.

Front

What is the product of two rational numbers?

Back

The product of two rational numbers is also a rational number. For example, 2/3 * 3/4 = 1/2.

Front

How do you divide rational numbers?

Back

To divide rational numbers, multiply by the reciprocal of the divisor. For example, (1/2) ÷ (3/4) = (1/2) * (4/3) = 2/3.

Front

What is the absolute value of a rational number?

Back

The absolute value of a rational number is its distance from zero on the number line, regardless of direction. For example, |-3| = 3.

Front

What is a mixed number?

Back

A mixed number is a whole number combined with a proper fraction, such as 2 1/2.

Front

How do you convert an improper fraction to a mixed number?

Back

To convert an improper fraction to a mixed number, divide the numerator by the denominator. For example, 7/4 = 1 3/4.

Front

What is the least common denominator (LCD)?

Back

The least common denominator is the smallest multiple that two or more denominators share. For example, the LCD of 1/4 and 1/6 is 12.