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What is the sum of [tex]$\frac{1}{9}$[/tex], [tex]$\frac{2}{3}$[/tex], and [tex][tex]$\frac{5}{18}$[/tex][/tex]?

A. [tex]$\frac{8}{30}$[/tex]
B. [tex]$\frac{12}{9}$[/tex]
C. [tex][tex]$\frac{19}{18}$[/tex][/tex]
D. [tex]$\frac{4}{15}$[/tex]


Sagot :

To find the sum of the fractions [tex]\( \frac{1}{9} \)[/tex], [tex]\( \frac{2}{3} \)[/tex], and [tex]\( \frac{5}{18} \)[/tex], we'll follow a step-by-step process to combine these fractions.

1. Identify a common denominator: The denominators of the given fractions are 9, 3, and 18. The least common multiple (LCM) of these numbers is 18.

2. Convert each fraction to have the common denominator:
- [tex]\( \frac{1}{9} \)[/tex] can be converted to its equivalent fraction with a denominator of 18:
[tex]\[ \frac{1}{9} = \frac{1 \times 2}{9 \times 2} = \frac{2}{18} \][/tex]
- [tex]\( \frac{2}{3} \)[/tex] can be converted to its equivalent fraction with a denominator of 18:
[tex]\[ \frac{2}{3} = \frac{2 \times 6}{3 \times 6} = \frac{12}{18} \][/tex]
- [tex]\( \frac{5}{18} \)[/tex] already has the common denominator, so it stays the same:
[tex]\[ \frac{5}{18} \][/tex]

3. Add the fractions:
[tex]\[ \frac{2}{18} + \frac{12}{18} + \frac{5}{18} = \frac{2 + 12 + 5}{18} = \frac{19}{18} \][/tex]

Therefore, the sum of [tex]\( \frac{1}{9} \)[/tex], [tex]\( \frac{2}{3} \)[/tex], and [tex]\( \frac{5}{18} \)[/tex] is [tex]\( \frac{19}{18} \)[/tex].

So, the correct answer is:
C. [tex]\( \frac{19}{18} \)[/tex]