Evaluate the following expressions: 1) (+30); 2) (+3) (-14); 3) -11*(-9); 4) (-1) *(+88); 5) (+81) : 1; 6) 14 - (+5); 7) 0 : (-76); 8) 0 * 84; 9) -56 : (+28); 10) (-21) * 4; 11) +24 : (-2); 12) (+58): (-58). 1) (-100); 2) (-6) -1; 3) -76 : (); 4) (+97); 5) (-3); 6) -22.; 7) 5 + 73; 8) (+53); 9) -6 -4; 10) +46; 11) (+59; 12) 14:

Выполним вычисления по порядку:

1. (+30) = 30


2. (+3) * (-14) = -42


3. -11 * (-9) = 99


4. (-1) * (+88) = -88


5. (+81) : 1 = 81


6. 14 - (+5) = 14 - 5 = 9


7. 0 : (-76) = 0


8. 0 * 84 = 0


9. -56 : (+28) = -2


10. (-21) * 4 = -84


11. +24 : (-2) = -12


12. (+58) : (-58) = -1

1. (-100) = -100


2. (-6) - 1 = -7


3. -76 : ( ) = division by zero. The expression -76 / 0 is undefined, or approaches infinity. division by zero is not defined in standard arithmetic, as no number, when multiplied by zero, produces a non-zero result (-76 in this case). It's better to leave it as undefined.


4. (+97) = 97


5. (-3) = -3


6. -22. = This appears to be an incomplete expression. If it is -22.0, then the result is -22.


7. 5 + 73 = 78


8. (+53) = 53


9. -6 - 4 = -10


10. +46 = 46


11. (+59) = 59


12. 14: = This appears to be an incomplete expression. If it is 14 / 1, then the result is 14.