Multiplying Fractions When do we Multiply? X of ()() ()2 2y To multiply fractions, we simply...
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Transcript of Multiplying Fractions When do we Multiply? X of ()() ()2 2y To multiply fractions, we simply...
Multiplying Fractions
When do we Multiply? X of ()() ()2 2y
To multiply fractions, we simply multiply numerators, and denominators.
Numerators x NumeratorsDenominators x Denominators
23 x 4
5 Just multiply across
2 x 43 x 5 = 8
15
On Paper
23
x 78
56
45
x
2 x 35
Whole numbers areplaced over 1.
21
Changing a mixed number to an improper fraction.
112
We multiply the WHOLE number and DENOMINATOR and add the NUMERATOR
1 x 2 + 12
= 32
The Denominator stays the same.
1 12 =
Whole Number
Numerator
Denominator
1 1
2x+
On Paper change to improper fractions
2 23
253
Changing a improper fraction to a mixed number
235
Divide the numerator by the denominator
2354
203
Whole Number
Numerator
Demoninator
435
On Paper change to mixed numbers
347 27
4
Multiplying Mixed NumbersNow we put it all together.
1 x 312
34
Step 1: Change mixed numbers to Improper Fractions.Step 2: Multiply Across, Numerators and Denominators.Step 3: Change Improper Fractions to Mixed/Whole Numbers.Step 4: Reduce if needed.
On Paper
2 x 123
45
Step 1: Change mixed numbers to Improper Fractions.Step 2: Multiply Across, Numerators and Denominators.Step 3: Change Improper Fractions to Mixed/Whole Numbers.Step 4: Reduce if needed.
Problem Solving
Vivian ate 1/4 her sister ate1/3 of what remained (3/4)
Her brother ate1/2 of whatremained
(1/2)
3* If the product of 1/2 and 1/2 is subtracted from the sum of 1/2 and 1/2, what is the difference?
5* Reduce 16/24
6* 1/8 + 3/8
7* 1/2 x 2/3
8* 7/12 - 3/12
14* Convert 18/4 to a mixed number. Remember to reduce the fraction part of the mixed number.
21* Compare: 2/3 x 3/2 1
24* (1/2 x 1/2) - 1/4
26* What fraction is 2/3 of 3/5 ?
27* What is the product of 3/4 and 4/3 ?