Dividing a Fraction by a Mixed Number

In this video, Mrs. C teaches how to divide fractions and mixed numbers using the 'Keep Change Flip' strategy. The lesson includes several practice problems, starting with dividing a fraction by a mixed number, then a fraction by a whole number, and finally, a mixed number by a fraction. The video concludes with a real-world word problem involving serving chili, reinforcing the division concepts. Cross-canceling is also demonstrated to simplify calculations.

What is the first step in dividing a fraction by a mixed number?

• Add the fraction and the mixed number

• Convert the mixed number to an improper fraction

• Multiply the fraction by the mixed number

• Convert the mixed number to a decimal

What does the Keep Change Flip strategy involve?

• Flipping both fractions and changing division to subtraction

• Keeping the first fraction, changing multiplication to division, and flipping the second fraction

• Keeping the first fraction, changing division to multiplication, and flipping the second fraction

• Keeping both fractions and changing division to addition

What is the purpose of cross-canceling in fraction multiplication?

• To add the fractions together

• To convert fractions to decimals

• To simplify the fractions before multiplying

• To make the fractions larger

Which numbers should you look at for cross-canceling opportunities?

• The numerators only

• The denominators only

• The whole numbers involved

• The diagonal numerator and denominator

How do you convert a whole number to a fraction?

• Add 0.5 to the whole number

• Place the whole number as the numerator and 1 as the denominator

• Place the whole number as the denominator and 1 as the numerator

• Multiply the whole number by 10

In the problem 2 4/7 divided by 3/7, what is the improper fraction form of 2 4/7?

• 16/7

• 18/7

• 20/7

• 14/7

What is the first step in solving a word problem involving division of fractions?

• Convert all numbers to decimals

• Identify the division problem setup

• Add all the numbers together

• Subtract the smaller number from the larger

In the chili cook-off problem, what is the division problem setup?

• 1/3 multiplied by 20 1/2

• 20 1/2 multiplied by 1/3

• 20 1/2 divided by 1/3

• 1/3 divided by 20 1/2

What is the result of dividing 123 by 2 in the word problem?

• 62

• 61

• 61 1/2

• 60

How many people can be served with 20 1/2 cups of chili if each serving is 1/3 cup?

• 61

• 62

• 63

• 60