Question

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Answer 1

а)

$23 + ( - 12) = 23 - 12 = 11$

б)

$- 24 + ( - 11) = - 24 - 11 = - (24 + 11) = - 35$

в)

$15 + ( - 19) = 15 - 19 = - (19 - 15) = - 4$

г)

$- 32 + ( - 12) = - 32 - 12 = - (32 + 12) = - 44$