Fraction in the lowest terms: A fraction is in its lowest term when the only common factor between the numerator and the denominator is 1.
1/2, 2/4, 3/6 are all equivalent fractions, but 1/2 is in its lowest term.
To reduce a fraction to its lowest terms you keep dividing the numerator and the denominator by the same number till you cannot divide further.
18/30 = 18 (÷2)/30 (÷2) = 9/15 = 9 (÷3)/15 (÷3) = 3/5
Addition of fractions
- Like fractions
3/5 + 1/5 = 4/5 - Unlike fractions
2/5 + 1/4 = 8/20 + 5/20 = 13/20 LCM of 5 and 4 is 20 - Mixed numbers
Subtraction of fractions
- Like fractions
8/9 – 3/9 = 5/9 - Unlike fractions
5/6 – 3/5 = 25/30 – 18/30 = 7/30 LCM of 6 and 5 is 30 - Mixed numbers
MULTIPLICATION OF FRACTIONS
A. Multiplying Fractions by whole Numbers
(a) Shalini is marking tea six people. She needs 2/3 teaspoon of leaves for each cup. How much will she need for 6 cups?
Repeated addion can also be also be shown as multiplication.
6×2/3 = ?
Step 1. Write the whole number as fraction
Step 2. Multiply the numerators
Step 3. Multiply the denominators
Step 4. Reduce to the lowest term
6×2/3 = 4
Answer: Shalini needs 4 teaspoons of tea leaves to make 6 cups of tea.
I need worksheet for Class 5th Mathematics.