Adding and Subtracting Rational Numbers

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 negative rational numbers?

Back

To add two negative rational numbers, you add their absolute values and keep the negative sign. For example, -3 + -5 = -(3 + 5) = -8.

Front

What is the result of -13 - (-4)?

Back

-9

Front

How do you subtract a negative number from a negative number?

Back

Subtracting a negative number is the same as adding its absolute value. For example, -5 - (-3) = -5 + 3 = -2.

Front

What is the sum of -12 and -8?

Back

-20

Front

How do you find the change in temperature when it drops from a positive to a negative value?

Back

Subtract the final temperature from the initial temperature. For example, if the temperature drops from 15 degrees to -12 degrees, the change is 15 - (-12) = 15 + 12 = 27 degrees.

Front

What is the result of -31 + -7?

Back

-38

Front

What does it mean to add rational numbers with different signs?

Back

When adding 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 -5 + 3?

Back

-2

Front

How do you represent a temperature drop of 27 degrees?

Back

A temperature drop of 27 degrees can be represented as a negative change, such as -27 degrees.