Predict
Fill in the blank:
When you multiply any number by a fraction that is equal to one whole, the product __________________.
When you multiply any number by a fraction that is equal to one whole, the product stays the same.
True or False?
If both the numerator and the denominator of a fraction are even numbers, then you know you CAN still reduce your fraction.
True
Divide: 2/5 ÷ 3/5
2/3
Multiply: 3/10 X 4/10
12/100
Susan bought 60 cookies. She shared 1/3 of them with her friends. How many cookies did she have left?
1/3 x 60 = 60/3 = 20 cookies given to friends
60 - 20 = 40 cookies left
Given the problem 2/2 x 3, predict whether the product will be greater than, less than, or equal to 3. Explain why.
The product will be equal to 3 because 2/2 is equal to one, and when you multiply by one the product is the same.
True or False?
When dividing fractions, you always change the division operation to multiplication.
True
Divide: 3 1/4 ÷ 5 2/4
13/22
Multiply: 4/8 X 3/7
3/14
Sara bought 12 feet of fabric to make curtains. She needs to cut into ¼ foot sections. How many sections of fabric will she have?
12 ÷ 1/4 = 12 x 4 = 48 sections
Fill in the blanks:
a) When you multiply any number by a fraction that is less than one whole, the product ________.
b) When you multiply any number by a fraction that is more than one whole, the product ________.
a) When you multiply any number by a fraction that is less than one whole, the product gets smaller.
b) When you multiply any number by a fraction that is more than one whole, the product gets bigger.
What kind of fraction is it, if the numerator is bigger than the denominator?
Improper Fraction
Divide: 6 8/9 ÷ 3 5/20
248/117
Multiply: 5 2/7 X 3 1/5
592/35
Ms. Swanson has 40 pairs of shoes. 6/8 of her shoes are high heels. How many of her shoes are high heeled?
6/8 x 40
30 of her shoes are high heeled
Given the problem 3/4 x 7, predict whether the product will be greater than, less than, or equal to 7. Explain why.
The product will be less than 7 because 3/4 is less than one, and when you multiply by a fraction less than one the product gets smaller.
True or False?
To multiply or divide fractions, you MUST have a common denominator.
False
Divide: 2 1/8 ÷ 4 3/8
17/35
Multiply: 7 1/4 X 3 7/14
203/8
Daniel has a block of fudge. The block weighs 1/6 of a pound. If he cuts the block into 6 equal slices, what will the weight of each slice be?
1/36 of a pound
Charlie ran 7 miles on Tuesday. Simba walked 2/3 as much as Charlie did. Did Simba walk more than, less than, or exactly 7 miles? Predict and explain why.
**If your prediction is correct, then solve the following to earn the points: How much did Simba walk?
Prediction: Simba walked less than 7 miles because Simba walked 2/3 of what Charlie walked (2/3 of 7), and when you multiply by a fraction less than one, the product gets smaller.
Solution: 2/3 x 7 = 4 2/3 miles; Simba walked 4 2/3 miles only.
True or False? If false, make it true.
When you divide fractions, you always "flip" the first fraction.
False
When you divide fractions, you always "flip" the second fraction.
Divide: 2 1/3 ÷ 4 5/8
56/111
Multiply: 9 8/9 X 7 3/5
3382/45
Jennifer has 3 ½ cups of jelly beans to share with 7 friends. How many cups does each person get?
3 ½ ÷ 7 = 7/2 x 1/7 = 7/14= 1/2 cup each