Exploring Adding and Subtracting Rational Expressions

This video tutorial explains how to divide decimals by whole numbers. It begins with an introduction to the concepts of dividend and divisor, followed by detailed steps on setting up division problems. The video includes several example problems to illustrate the process, emphasizing the importance of moving the decimal point and inserting zeros when necessary. The tutorial concludes with application questions that involve dividing decimals in real-world scenarios, such as calculating cost per unit or average time per distance.

What is the first step when setting up a division problem involving decimals?

• Slide the decimal point up

• Divide as normal

• Bring down the divisor

• Insert zeros into the dividend

In the division problem 42.3 ÷ 9, what is the correct placement of the decimal point in the quotient?

• At the end of the quotient

• Before the first digit

• After the first digit

• After the second digit

When dividing 56.52 by 6, what is the quotient?

• 9.72

• 9.62

• 9.52

• 9.42

In the problem 13.8 ÷ 4, what should you do if you run out of digits in the dividend?

• Stop the division

• Add a zero to the dividend

• Bring down the divisor

• Move the decimal point

How many times does 18 go into 72 in the problem 72.00 ÷ 18?

• 4 times

• 3 times

• 2 times

• 5 times

If 50.4 ounces of lemonade is divided equally into 8 cups, how many ounces are in each cup?

• 6.2 ounces

• 6.3 ounces

• 6.5 ounces

• 6.4 ounces

Eliza paid $16.80 for a 40-pound bag of dog food. What is the cost per pound?

• 0.62 dollars

• 0.52 dollars

• 0.42 dollars

• 0.32 dollars

Marcie sent 124 text messages and paid $16.12. How much did she pay per message?

• 0.13 dollars

• 0.12 dollars

• 0.14 dollars

• 0.11 dollars

If a runner took 11.4 seconds to run 50 yards, how many seconds did it take to run each yard (rounded to the nearest hundredth)?

• 0.25 seconds

• 0.24 seconds

• 0.23 seconds

• 0.22 seconds

How many ounces of juice are there per serving if an 86.4-ounce bottle is divided into 11 servings (rounded to the nearest hundredth)?

• 7.84 ounces

• 7.85 ounces

• 7.83 ounces

• 7.82 ounces