Mastering Multiplication and Division of Rational Numbers

Why does the teacher emphasize understanding the mathematical concepts rather than just using a calculator?

• To make the class more interesting

• To ensure students can solve problems without a calculator

• To make the video longer

• To confuse the students

What is the result when multiplying or dividing two numbers with matching signs?

• Negative

• Undefined

• Zero

• Positive

What is the result when multiplying or dividing a positive number and a negative number?

• Undefined

• Zero

• Negative

• Positive

What must you do to a mixed number before multiplying fractions?

• Convert it to a decimal

• Convert it to an improper fraction

• Convert it to a whole number

• Leave it as it is

What is the first step in multiplying fractions?

• Add the numerators

• Subtract the denominators

• Divide the numerators

• Multiply the numerators

What is the result of multiplying 4/5 by 9?

• 36/5

• 4/45

• 45/4

• 5/36

What does KFC stand for in the context of dividing fractions?

• Keep, Flip, Change

• Keep, Find, Calculate

• Keep, Flip, Compare

• Keep, Find, Change

What is the reciprocal of 2/5?

• 5/1

• 2/5

• 5/2

• 1/5

What is the result of dividing 3/8 by 2/5 using the KFC method?

• 15/16

• 40/3

• 16/15

• 3/40

What is the simplified result of dividing -6/5 by 3/10?

• -4

• 4

• -1/2

• 1/2