Operations with Rational Numbers 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

How do you add two rational numbers with different signs?

Back

When adding two rational numbers with different signs, subtract the smaller absolute value from the larger absolute value and keep the sign of the number with the larger absolute value.

Front

What is the result of adding -5.5 and 3.2?

Back

-5.5 + 3.2 = -2.3.

Front

How do you subtract rational numbers?

Back

To subtract rational numbers, add the opposite of the number being subtracted.

Front

What is the result of subtracting -4.5 from 2.3?

Back

2.3 - (-4.5) = 2.3 + 4.5 = 6.8.

Front

How do you multiply two rational numbers?

Back

To multiply two rational numbers, multiply their numerators and multiply their denominators.

Front

What is the result of multiplying -2 and 3?

Back

-2 * 3 = -6.

Front

How do you divide rational numbers?

Back

To divide rational numbers, multiply by the reciprocal of the divisor.

Front

What is the result of dividing -8 by 2?

Back

-8 ÷ 2 = -4.

Front

What does it mean for a number to be below sea level?

Back

A number below sea level is represented as a negative number, indicating a position under the reference point of sea level.