DIviding Mixed Numbers Guided Lesson Pt 2

Dividing mixed numbers by fractions

Lesson Goal

Interpret and compute quotients of fractions and solve word problems involving division of fractions by fractions.

Let's practice rewriting division problems as multiplication problems.

To find the reciprocal

flip the fraction over

Reciprocal of a Whole Number

Remember

-all whole numbers can be made into fractions by putting a 1 as the denominator.

Trouble area: Coverting your answer from a mixed number to an improper fraction

Multiple Choice

Change the improper fraction into a mixed number.

$$\frac{19}{2}$$

• $$2$$

• $$9\ \frac{1}{2}$$

• $$2\ \frac{1}{9}$$

• $$\frac{2}{9}$$

Multiple Choice

Change the improper fraction to a mixed number.

$$\frac{27}{4}$$

• $$6\ \frac{4}{3}$$

• 6

• $$8\ \frac{1}{2}$$

• $$6\ \frac{3}{4}$$

Multiple Choice

Answer the question in the picture.

• The product (answer) would be greater than 8

• The product (answer) would be less than 8

Multiple Choice

Answer the question in the picture

• More than 2
• Less than 2

Multiple Choice

Answer the question in the picture.

• 1) Larger 2) Smaller
• 1) Smaller 2)Larger

Multiple Choice

$$25\ \div\ 2\frac{1}{2}$$   Solve: Use your whiteboard

• $$12\frac{1}{2}$$  

• $$8\frac{12}{35}$$  

• $$8\frac{4}{15}$$  

• 10

Multiple Choice

Carlos has 5/8 pounds of pumpkin seed. He puts them in 10 bags. How many pounds does he have in each bag? Solve using your white board

• $$\frac{1}{16}$$

• $$\frac{50}{8}$$

• $$6\ \frac{1}{4}$$

Multiple Choice

Kelly has $$2\frac{1}{2}$$  feet of fabric.   She needs  $$\frac{1}{4}$$ foot to make each ribbon.  How many ribbons can Kelly make?

• 5

• $$\frac{5}{8}$$  

• 10

• 12

Fill in the Blanks

Ava uses   $5\ \frac{1}{2}$  liters of paint to paint mailboxes. Each mailbox takes  $\frac{1}{4}$  liter of paint. How many mailboxes can she paint?

Multiple Choice

• 14 cookies
• 1/2 cookies
• 28 cookies
• 1/28 cookies

Poll

Dividing with Fractions and Mixed Numbers -- If you are struggling or still getting some incorrect, what would you say is the hardest part? (You may choose more than one)

• Remembering to flip the second number.

• Multiplying the fractions

• Fixing an improper fraction

• Changing the Mixed numbers to fractions

• All of it!

Poll

How would you rank yourself on this skill?

• This is easy! I could do harder problems.

• Its pretty easy! I got it!

• I'm ok at it. I get most correct.

• I'm about half and half.

• I'm still struggling.