Rational Numbers Operations Review

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

What is the sum of a positive and a negative number?

Back

The sum of a positive and a negative number depends on the absolute values of the numbers. If the positive number is greater, the result is positive; if the negative number is greater, the result is negative.

Front

Calculate: 5 + (-7)

Back

-2

Front

What is the product of two negative numbers?

Back

The product of two negative numbers is always positive.

Front

Calculate: -9 • (-4)

Back

36 (positive) because the product of two negative numbers is positive.

Front

What does it mean to be below sea level in terms of rational numbers?

Back

Being below sea level is represented by negative numbers, indicating a position lower than the reference point of sea level.

Front

If Tue is at -8 1/2 feet and descends 5 1/2 feet, how do you calculate his new position?

Back

You add the two negative numbers: -8 1/2 + (-5 1/2) = -14.

Front

Calculate: 8 1/2 + (-5 1/2)

Back

-14

Front

How do you subtract fractions with different denominators?

Back

Find a common denominator, convert the fractions, and then subtract the numerators.

Front

Calculate: 9 1/2 - 7 1/3

Back

2 1/6