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 rational numbers with different denominators?

Back

To add two rational numbers with different denominators, find a common denominator, convert each fraction, and then add the numerators.

Front

What is the process for subtracting rational numbers?

Back

To subtract rational numbers, convert them to a common denominator, then subtract the numerators and keep the common denominator.

Front

What is the value of the expression -1/3 - 4/5?

Back

-17/15

Front

How do you find the change in temperature when given two temperatures?

Back

Subtract the initial temperature from the final temperature. If the result is positive, the temperature rose; if negative, it fell.

Front

What is the change in temperature from -4.7 degrees to 11.6 degrees?

Back

16.3 degrees

Front

How do you represent depth in a number line?

Back

Depth is represented as negative values below the surface level, while heights above the surface are positive.

Front

What is the depth of a submarine that descends 20.6 meters and ascends 5.7 meters?

Back

-14.9 meters

Front

What is the value of the expression 3.1 + (-6.3)?

Back

-3.2

Front

How do you simplify the expression -1/3 - (-5/12)?

Back

1/12