Question 124ivName the property used here-2-7 - 0 - 0 - -2-7 - -2-7

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Identities of Mathematical Operations

Question 124i...

Question

Question 124(iv)
Name the property used here:

$\frac{- 2}{7} + 0 = 0 + \frac{- 2}{7} = - \frac{2}{7}$

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(\frac{- 3}{7}) + \frac{1}{9} = \frac{1}{9} + (\frac{- 3}{7})

\frac{4}{9} + (\frac{7}{8} + \frac{1}{2}) = (\frac{4}{9} + \frac{7}{8}) + \frac{1}{2}

8 + \frac{7}{10} = \frac{7}{10} + 8

(\frac{- 7}{15}) + 0 = \frac{- 7}{15} = 0 + (\frac{- 7}{15})

\frac{2}{5} + (\frac{- 2}{5}) = 0

- \frac{13}{17} \times \frac{- 2}{7} = \frac{- 2}{7} \times \frac{- 13}{17}

- \frac{13}{17} \times \frac{- 2}{7} = \frac{- 2}{7} \times \frac{- 13}{17}

Using the property of determinants and without expanding.

$∣ ∣ ∣ ∣ \begin{matrix} 2 & 7 & 65 3 & 8 & 75 5 & 9 & 86 \end{matrix} ∣ ∣ ∣ ∣ = 0$

\frac{2}{3}

\frac{4}{7}

\frac{4}{7}

\frac{2}{3}

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