Question

What number added to 2/5 gives 9/10​

Answer 1

Step-by-step explanation:

Let the number is x,

$x + \frac{2}{5} = \frac{9}{10}$

$x = \frac{9}{10} - \frac{2}{5}$

$x = \frac{9 - 4}{10}$

$x = \frac{5}{10}$

$x = \frac{1}{2}$

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Answer 2

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