Add and Subtract Positive Rational Numbers Flashcard

Front

What is a positive rational number?

Back

A positive rational number is a number that can be expressed as the quotient or fraction of two integers, where the numerator is a positive integer and the denominator is a non-zero integer.

Front

How do you add two positive rational numbers?

Back

To add two positive rational numbers, convert them to a common denominator if necessary, then add the numerators and keep the denominator the same.

Front

How do you subtract two positive rational numbers?

Back

To subtract two positive rational numbers, convert them to a common denominator if necessary, then subtract the numerators and keep the denominator the same.

Front

What is the change received when you pay more than the total cost?

Back

The change is the amount of money returned to you after you pay for something, calculated by subtracting the total cost from the amount paid.

Front

Convert 0.7 to a fraction.

Back

0.7 as a fraction is 7/10.

Front

Convert 3/20 to a decimal.

Back

3/20 as a decimal is 0.15.

Front

What does it mean to simplify a fraction?

Back

To simplify a fraction means to reduce it to its lowest terms, where the numerator and denominator have no common factors other than 1.

Front

What is the simplified form of 21/49?

Back

The simplified form of 21/49 is 3/7.

Front

How do you find the weight of an unknown object when given the total weight and the weights of other objects?

Back

To find the weight of the unknown object, subtract the total weight of the known objects from the total weight.

Front

If Elijah's pig weighs 116.8 pounds and his hamster weighs 0.063 pounds, how do you find the weight of his dog?

Back

You subtract the combined weight of the pig and hamster from the total weight of all three animals.