Question
Fill in the blank.
$\frac{2}{3}-(......)=\frac{1}{15}$

Answer

$\frac{2}{3}-\frac{3}{5}=\frac{1}{15}$Solution:
Let the blank space be x Now, we have:$\frac{2}{3}-\text{x}=\frac{1}{15}$
$\Rightarrow-\text{x}=\frac{1}{15}-\frac{2}{3}$
$\Rightarrow-\text{x}=\frac{1-10}{15}$
$\Rightarrow-\text{x}=\frac{-9}{15}$
$\Rightarrow\text{x}=\frac{9}{15}$
$\Rightarrow\text{x}=\frac{3}{5}$

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