Question

Calculati:
a) |-5| - |+2| + |-3| - |-1|
b) 11 - [-1 + 3 - ( -3 + 15) - 7]
c) -15 + {-1 + [7 - (+14 - 3)] - 7}

Answer 1

a) |-5| - |+2| + |-3| - |-1| = 5-2+3-1 = 5
b) 11 - [-1 + 3 - ( -3 + 15) - 7] = 11- (-1 + 3 + 3 -15 - 7) = 11 - (-17) = 11 + 17 = 28
c) -15 + {-1 + [7 - (+14 - 3)] - 7} = -15 + [-1 + (7- 11) -7] = -15 + (-1 -4 - 7) = - 15 + (-12) = - 27 

Answer 2

a= (-7)+(-3)-(-1) => (-10)-1= -9

 b= 11-(-1+3-18-7) => 11-21 =-11

c= -15 + {-1 + [7 - ( +14-3)] -7 } => -15+ [-1 + ( 7 - 17 ) -7 ] => -15+ (-18) = -33