Unit 3 Flashcard 3 Prep (add/subtract 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, find a common denominator, convert each fraction, and then subtract the numerators.

Front

What is the result of -3/7 + 4/5?

Back

13/35

Front

If the temperature is 3°C and it drops by 7.5 degrees, what is the new temperature?

Back

-4.5°C

Front

What is -1 1/4 + -2 1/2?

Back

-3 3/4

Front

How do you convert a mixed number to an improper fraction?

Back

Multiply the whole number by the denominator, add the numerator, and place the result over the original denominator.

Front

What is the result of 2/9 + -4/9?

Back

-2/9

Front

If a rock climber is at 0.74 miles above sea level and ascends 0.18 miles, what is their new elevation?

Back

0.92 miles above sea level.

Front

What is the result of 0.74 - 0.8?

Back

-0.06 miles below sea level.