Exploring Multiplication of Rational Numbers

What materials do you need to have ready before starting the lesson?

• Notebook, pen, and calculator

• Textbook, pencil, and calculator

• Textbook, pencil, and notebook

• Textbook, pen, and ruler

What is the result of multiplying a positive number by a negative number?

• Positive

• Zero

• Negative

• Undefined

What is the first step in the 'simplify before you multiply' method?

• Add the fractions

• Divide by common factors

• Multiply straight across

• Convert to decimals

What is the simplified result of multiplying 3/4 by 7/9?

• 21/36

• 7/12

• 1/3

• 5/6

How do you convert a mixed number to an improper fraction?

• Subtract the numerator from the whole number

• Multiply the numerator by the denominator

• Add the whole number to the numerator

• Multiply the whole number by the denominator and add the numerator

What is the result of multiplying -16/5 by 15/4?

• -7/24

• 7/24

• -24/7

• 24/7

When should you keep numbers in fraction form instead of converting to decimals?

• When the numbers are small

• When dealing with terminating decimals

• When dealing with non-terminating or repeating decimals

• When the numbers are large

What is the fraction form of -2.75?

• -11/4

• -2 3/4

• -3 1/4

• -2 1/2

How many decimal places should be in the product if the factors have four decimal places in total?

• Two

• Five

• Three

• Four

What is the final simplified result of multiplying 1/4, 9.5, 0.8, and 2 1/5?

• 2.375

• -2.375

• -4.18

• 4.18