Dividing Decimals Using Multiplication

This lesson teaches how to divide decimals by leveraging multiplication knowledge. It begins with a review of multiplication and division as inverse operations, then explains the effects of multiplying and dividing by 10. Common mistakes in decimal division are addressed, followed by practical examples, such as calculating the number of pounds of grapes one can buy with a given amount of money. The lesson concludes with a summary of the key points covered.

What is the inverse operation of multiplication?

• Exponentiation

• Division

• Subtraction

• Addition

If you multiply a number by 10, how does the result compare to the original number?

• It is 10 times smaller

• It is 100 times larger

• It is 10 times larger

• It remains the same

What happens when you divide a number by 10?

• The quotient is 100 times smaller

• The quotient is 10 times smaller

• The quotient is 10 times larger

• The quotient remains the same

Why is 12 divided by six-tenths not equal to 2?

• Because 12 is not divisible by 6

• Because the decimal point is ignored

• Because 12 is a whole number

• Because six-tenths is larger than 12

How many pounds of grapes can Jack buy with $35 if each pound costs 50 cents?

• 35 pounds

• 50 pounds

• 70 pounds

• 100 pounds