Understanding Division and Rational Numbers

The lesson covers multiplication and division of rational numbers, demonstrating that the rules for integers apply to rational numbers. It includes practical examples like borrowing money at a carnival and calculating monthly expenses from annual costs. The lesson emphasizes the importance of understanding decimals and fractions in these calculations.

What is the main objective of the lesson on multiplication and division of rational numbers?

• To explore the history of rational numbers

• To understand the concept of irrational numbers

• To apply the rules for multiplying and dividing integers to rational numbers

• To learn how to add and subtract rational numbers

If you borrow $3.50 twice, how much do you owe in total?

• $3.50

• $5.00

• $10.00

• $7.00

How many decimal places should be in the answer when multiplying $3.50 by 2?

• None

• Two

• One

• Three

Why is it important to write answers in complete sentences, especially in story problems?

• To confuse the reader

• To make the answer longer

• To avoid using numbers

• To ensure clarity and understanding

What is the first step in solving the division problem for monthly expenses?

• Subtract 12 from the total

• Divide the total by 12

• Multiply the total by 12

• Add 12 to the total

When performing long division, why is it important to line up numbers correctly?

• To make the division faster

• To avoid using decimals

• To ensure accuracy in calculations

• To make the numbers look neat

What is the monthly charge for Melinda's parents after rounding?

• $220.10

• $220.09

• $220.08

• $220.07

What should you do if the decimal in a division problem is in the divisor?

• Ignore it

• Add more decimals

• Move it to the dividend

• Move it to make the divisor a whole number

What is a rational number?

• A number that is always positive

• A number that can be made into a fraction and has repeating or terminating decimals

• A number that is always negative

• A number that cannot be expressed as a fraction

Which of the following is true about the rules for integers and rational numbers?

• They are the same

• They are completely different

• They only apply to addition

• They only apply to subtraction