Question

verify that a+b=b+a for each of the following:

class 8, rational numbers..solve correctly and properly with workings​

Answer 1

Answer:

let check it

Step-by-step explanation:

(a)

$(a)= \frac{ - 9}{11} + \frac{ - 4}{11} = \frac{ - 4}{11} + \frac{ - 9}{11} \\ = \frac{ - 9}{11} - \frac{4}{11} = \frac{ - 4}{11} - \frac{9}{11} \\ = \frac{ - 9 - 4}{11} = \frac{ - 4 - 9} {11} \\ = \frac{ - 13}{11} = \frac{ - 13}{11} \: verifed \\ (b) = \frac{4}{5} + \frac{ - 3}{10} = \frac{ - 3}{10} + \frac{4}{5} \\ = \frac{ 4}{5} - \frac{3}{10} = - \frac{ 3}{10} + \frac{4}{5} \\ = \frac{8 - 3}{10} = \frac{ - 3 + 8}{10} \\ = \frac{5}{10} = \frac{5}{10} \\ = \frac{1}{2} = \frac{1}{2} \: verified$

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