Hello vergita:
a) To multiply fractions, you multiply the denominators and the
numerators seperately, to create a new fraction.
So: 1 * 1 * 1 = 1
and: 2 * 3 * 4 = 24
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Result: 1/24
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b) We start as before:
So: 2 * 3 = 6
and: 5 * 4 = 20
To do division of fractions, we invert the second fraction's numerator
and denominator - so 2/3 becomes 3/2. Then, we just multiply as above:
So: 6 * 3 = 18
and: 20 * 2 = 40
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Result: 18/40, which reduces to 9/20
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c) 1/2 - 1/7
To do subtraction of fractions, we find the Lowest Common Denominator
- in this case, 14 is the lowest number that 2 and 7 divide into.
So: 7/14 - 2/14
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Result: 5/14
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d) LCM for 1/3 and 2/5 is 15.
So: 5/15 + 6/15 = 11/15
LCM for 11/15 and 1/8 is 120
So: 88/15 - 15/120
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Result: 73/120
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e) LCM for 4/5 and 1/7 is 35
So: 28/35 - 5/35 = 23/35
and: 23/35 + 14/35 = 37/35
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Result: 37/35 or 1 and 2/35
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I hope this helps! If anything's unclear, please feel free to request
clarification prior to rating this answer.
All the best,
--seizer-ga |