Mastering Multiplication and Division of Rational Numbers

What is a rational number?

• A whole number

• A fraction or a decimal

• An irrational number

• A complex number

What is the first step in multiplying decimals?

• Ignore the negatives

• Subtract the decimals

• Line up the decimals

• Add the decimals

When multiplying decimals, what should you do after multiplying the numbers?

• Ignore the decimals

• Subtract the decimals

• Count the numbers behind the decimal and move it

• Add the decimals

What is the first rule in dividing decimals?

• Line up the decimals

• Ignore the negatives

• Move the decimal in the dividend

• Add a zero

What should you do with the decimal in the divisor when dividing decimals?

• Move it out and move it equal spaces in the dividend

• Ignore it

• Add it to the dividend

• Subtract it from the dividend

What is the first step in multiplying fractions?

• Reduce the fractions

• Check for negatives

• Convert all mixed numbers to improper fractions

• Multiply straight across

How do you multiply fractions?

• Subtract the numerators and denominators

• Add the numerators and denominators

• Divide the numerators and denominators

• Multiply straight across the top and bottom

What is the first step in dividing fractions?

• Convert all mixed numbers to improper fractions

• Multiply straight across

• Keep, Change, Flip

• Reduce the fractions

What does 'Keep, Change, Flip' mean in dividing fractions?

• Keep the first fraction, change the numerator, flip the denominator

• Keep the first fraction, change the multiplication to division, flip the second fraction

• Keep the first fraction, change the denominator, flip the numerator

• Keep the first fraction, change the division to multiplication, flip the second fraction

What should you always check after performing operations with fractions?

• If the fractions are improper

• If the fractions are whole numbers

• If the answer is positive or negative

• If the fractions are mixed