Multiply and Divide 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 multiply two rational numbers?

Back

To multiply two rational numbers, multiply their numerators together and their denominators together.

Front

What is the product of 1/2 and 4/5?

Back

2/5

Front

How do you divide two rational numbers?

Back

To divide two rational numbers, multiply the first number by the reciprocal of the second number.

Front

What is the reciprocal of 3/4?

Back

4/3

Front

If Benjamin uses 3.57 cups of flour, how much does Lily use if she uses 4.6 times more?

Back

16.422 cups of flour.

Front

How much did Sarah spend on 2.5 meters of fabric at $6.20 per meter?

Back

$15.50

Front

What is 5/3 ÷ 15/7?

Back

7/9

Front

What is the result of dividing 30 candies by 0.8?

Back

37.5 candies.

Front

What is the formula for multiplying fractions?

Back

(a/b) * (c/d) = (a*c)/(b*d) where a, b, c, and d are integers.