Evaluate \; 4/5 - \; 1/3 + \; 2/9

Correct Answer is : 3145\; 31/454531

Correct Answer is : 3145\; 31/454531

Test Index

BECE Mathematics 2016 Paper

Question : 8

Total: 40

Evaluate

\; \frac{4}{5} - \; \frac{1}{3} + \; \frac{2}{9}

Solution:

\; \frac{4}{5} - \; \frac{1}{3} + \; \frac{2}{9}

1. Find the L.C.M of the denominators to use as the general denominators for each of the fractions

The L.C.M for 5,3 and 9 is

\{4\ 5\}

2. Multiply the numerators of each fractions by the number of times the denominator can divide the L.C.M (general denominator)

3. Simplify

\;\; \frac{4}{5} - \; \frac{1}{3} + \; \frac{2}{9} = \; \frac{9 \times 4 - 15 \times 1 + 5 \times 2}{45}

\;\; \frac{4}{5} - \; \frac{1}{3} + \; \frac{2}{9} = \; \frac{36-15+10}{45}

\;\; \frac{4}{5} - \; \frac{1}{3} + \; \frac{2}{9} = \; \frac{31}{45}

Go to Question:

Prev Question

Next Question