Use addition properties to show that the expressions r equal at each step, indicate what propety u used?

(s+63)+19 and (63+19)+s

please show work and by the way i put my problem on the details because i didn't have any space left to write it

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  • Anonymous
    1 decade ago
    Favorite Answer

    Addition has the property of associativity - i.e (a+b)+c = a+(b+c) for any numbers a,b and c.

    So (s+63)+19 = s + (63+19)

    Addition also has the property of commutativity - i.e. a+b = b+a for any numbers a and b.

    So s + (63+19) = (63+19) + s

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