Rational Number 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

How do you round a number to the nearest whole number?

Back

To round a number to the nearest whole number, look at the digit in the tenths place. If it is 5 or greater, round up. If it is less than 5, round down.

Front

What is the absolute value of a number?

Back

The absolute value of a number is its distance from zero on the number line, regardless of direction. For example, |-4| = 4.

Front

How do you find the difference between two temperatures?

Back

To find the difference between two temperatures, subtract the lower temperature from the higher temperature.

Front

What is the product of two decimal numbers?

Back

The product of two decimal numbers is found by multiplying them as if they were whole numbers, then placing the decimal point in the result based on the total number of decimal places in the factors.

Front

How do you subtract fractions with different denominators?

Back

To subtract fractions with different denominators, first find a common denominator, convert the fractions, and then subtract the numerators.

Front

What is the formula for finding the weight of items when sold in bags?

Back

The formula is: Number of bags = Total weight / Weight per bag.

Front

What is the sum of two rational numbers?

Back

The sum of two rational numbers is found by adding their numerators over a common denominator.

Front

How do you multiply a fraction by a whole number?

Back

To multiply a fraction by a whole number, multiply the numerator of the fraction by the whole number and keep the denominator the same.

Front

What is the difference between a positive and a negative number?

Back

A positive number is greater than zero, while a negative number is less than zero. The difference is the result of subtracting one from the other.