Multiply Fractions and Cancel Out

Can you cross- cancel before multiplying these fractions?

• Yes, you can cancel 4 and 11

• Yes, you can cancel 3 and 12

• Yes, you can cancel all of the numbers

• No, you cannot cancel 

Answer explanation

Yes, you can cross-cancel before multiplying. The 3 in the numerator of the first fraction can be canceled with the 12 in the denominator of the second fraction, simplifying the multiplication.

Mrs. Zimmer's class is making pillow cases. Each pillow case uses 3/4 of a yard of fabric. How many pillow cases can they make out of 12 1/2 yards of fabric?

• They can make 18 pillow cases.

• They can make 16 pillow cases.

• They can make 28 pillow cases.

• They can make 6 pillow cases.

Answer explanation

To find how many pillow cases can be made, divide the total fabric (12.5 yards) by the fabric needed for one pillow case (0.75 yards). 12.5 ÷ 0.75 = 16. Therefore, they can make 16 pillow cases.

Find the product:

• 2/14

• 1/49

• 2/7

• 1/14

Find the product.  Then, simplify.

• 2/24

• 3/24

• 1/12

• 3/16

Which equation matches the model?

• 4/6 x 2/6 = 8/36 sq units

• 5/6 x 2/6 = 10/36 sq units

• 5 + 5 = 10 sq units

• 2/5 x 5/6 = 10/30

Multiply these fractions

• 2 / 18

• 2 / 7

• 1  1/3

• 2 / 1.6

Multiply and answer in simplest form.

• 1/21

• 4/84

• 1/10

• 1/28

When multiplying fractions you do what?

• KCF

• Find the least common denominator

• Multiply all of the numbers together

• Multiply top times top and bottom times bottom

Find the product:

• 9/24

• 9/28

• 6/32

• 1/28

• To multiply.

• To Divide

• To cancel out the fives and then multiply, then simplify.

• To cancel out the fives and then multiply