QUESTION 3
iii
Easy
Find the difference:
\(\frac{−7}{9}\) − \((\frac{−2}{3})\)
SOLUTION
The LCM of 9 and 3 = 9
\(\begin{aligned} \frac{−7}{9} − (\frac{−2}{3}) &= \frac{−7}{9} + \frac{2}{3} \\ &= \frac{−7 + 2(3)}{9} \\ &= \frac{−7 + 6}{9} \\ &= \frac{−1}{9}\end{aligned}\)
The sum is \(\frac{−1}{9}\).
\(\begin{aligned} \frac{−7}{9} − (\frac{−2}{3}) &= \frac{−7}{9} + \frac{2}{3} \\ &= \frac{−7 + 2(3)}{9} \\ &= \frac{−7 + 6}{9} \\ &= \frac{−1}{9}\end{aligned}\)
The sum is \(\frac{−1}{9}\).
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Final Answer : \(\frac{−1}{9}\)