Вычислить:

1) а) 15 + ( -3 ) ; б) - 4 + ( - 7 ) ; в) – 6 + 10 ; г) – 11 + ( - 3 );


2) а) 15 – ( -3 ) ; б) - 4 – (- 7 ) ; в) - 6 – 10; г) - 11 – ( - 3);


3) а) 34 + ( - 11 ); б) - 32 – ( - 23 ); в) - 7 + ( - 54 ); г) - 24 – 34;


4) а) 42 + ( - 26 ) – ( -16 ) ; б) - 36 – ( -8 ) + ( -22 ) ; в) - 48 + 48 + ( - 4 ) ; г) - 11 – ( - 11 ) + 5;


5) - 37 + ( - 36 ) + ( - 35 ) + … + 34 + 35 + 36.


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