Exemplar exercise problems XXI — task. Mathematics CBSE, Class 8.

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Verify the property

$x + y = y + x$ of rational numbers by taking

(a)

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

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

(b)

$x = \frac{-2}{3}$ ,

$y = \frac{-5}{6}$

(c)

$x = \frac{-3}{7}$ ,

$y = \frac{20}{21}$

(d)

$x = \frac{-2}{5}$ ,

$y = \frac{-9}{10}$

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33. Exemplar exercise problems XXI