-7-5 - 2-11 - -13-25 - -75 - 2-11 - -13-25This property is

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Associative Property of Rational Numbers

-7/5 + 2/-11 ...

Question

$\frac{- 7}{5} + (\frac{2}{- 11} + \frac{- 13}{25}) = (\frac{- 7}{5} + \frac{2}{- 11}) + \frac{- 13}{25}$
This property is

closure

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commutative

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associative

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identity

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Solution

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Similar questions

2, 3, 13, 5, 7, 74, 11, 13, ?

Re-arrange suitably and find the sum in each of the following :

(i) $\frac{11}{12} + \frac{- 17}{3} + \frac{11}{2} + \frac{- 25}{2}$

(ii) $\frac{- 6}{7} + \frac{- 5}{6} + \frac{- 4}{9} + \frac{- 15}{7}$

(iii) $\frac{3}{5} + \frac{7}{3} + \frac{9}{5} + \frac{- 13}{15} + \frac{- 7}{3}$

(iv) $\frac{4}{13} + \frac{- 5}{8} + \frac{- 8}{13} + \frac{9}{13}$

(v) $\frac{2}{3} + \frac{- 4}{5} + \frac{1}{3} + \frac{2}{5}$

(vi) $\frac{1}{8} + \frac{5}{12} + \frac{2}{7} + \frac{7}{12} + \frac{9}{7} + \frac{- 5}{16}$

A = {2, 3, 5, 7, 11, 13}

B = {5, 7, 9, 11, 15}

U = {2, 3, 5, 7, 9, 11, 13, 15}

Question 81 (i)

Simplify: $\frac{13}{11} \times \frac{- 14}{5} + \frac{13}{11} \times \frac{- 7}{5} + \frac{- 13}{11} \times \frac{34}{5}$

Explain why $7 \times 11 \times 13 + 13$ & $7 \times 6 \times 5 \times 4 \times 3 \times 2 \times 1 + 5$ are composite numbers ?

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