Multiply & 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. For example, (a/b) * (c/d) = (a*c)/(b*d).

Front

What is the product of 6.3 and 0.6?

Back

3.78

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. For example, (a/b) ÷ (c/d) = (a/b) * (d/c).

Front

If a plant grows 0.25 cm every day for 21 days, what is the total amount of growth?

Back

5.25 cm

Front

What is the reciprocal of a rational number?

Back

The reciprocal of a rational number a/b is b/a, provided that a and b are not zero.

Front

What happens when you multiply a rational number by zero?

Back

When you multiply any rational number by zero, the product is always zero.

Front

What is the result of dividing a rational number by itself?

Back

The result of dividing a rational number by itself (except for zero) is always 1.

Front

How do you convert a decimal to a fraction?

Back

To convert a decimal to a fraction, write the decimal as a fraction with a denominator of 1, then multiply the numerator and denominator by 10 for each digit after the decimal point.

Front

What is the significance of the denominator in a fraction?

Back

The denominator indicates how many equal parts the whole is divided into.