А) 3 - ( -6 ) = 3 + 6 = 9;
Б) - 2,5 - ( - 4 ) = - 2,5 + 4 = 4 - 2,5 = 1,5;
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А) 3 - ( -6 ) = 3 + 6 = 9;
Б) - 2,5 - ( - 4 ) = - 2,5 + 4 = 4 - 2,5 = 1,5;