Add and Subtract Positive Rational Numbers 5.3K - 5th Grade

Front

What is a positive rational number?

Back

A positive rational number is a number that can be expressed as a fraction where both the numerator and the denominator are positive integers.

Front

How do you add two positive rational numbers?

Back

To add two positive rational numbers, find a common denominator, convert the fractions if necessary, and then add the numerators while keeping the common denominator.

Front

How do you subtract one positive rational number from another?

Back

To subtract one positive rational number from another, find a common denominator, convert the fractions if necessary, and then subtract the numerators while keeping the common denominator.

Front

What is the sum of 1/2 and 1/4?

Back

The sum of 1/2 and 1/4 is 3/4.

Front

What is the difference between 3/4 and 1/2?

Back

The difference between 3/4 and 1/2 is 1/4.

Front

If you have 2 1/4 gallons and serve 3/8 gallon, how do you find the remaining amount?

Back

Convert 2 1/4 to an improper fraction (9/4), convert 3/8 to a common denominator, and subtract: 9/4 - 3/8 = 1 7/8 gallons.

Front

What is an improper fraction?

Back

An improper fraction is a fraction where the numerator is greater than or equal to the denominator.

Front

Convert the mixed number 2 1/3 to an improper fraction.

Back

2 1/3 as an improper fraction is 7/3.

Front

What is the first step in adding fractions with different denominators?

Back

The first step is to find a common denominator.

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.