a) -(2015+2016)+(2015+2017)= -2015-2016+2015+2017= (2015-2015)+(2017-2016)= 0+1=1 b) -(16-17)+(-34-17)= -16+17-34-17=(17-17)-(-34-16)=0+(34+16)=0+50=50 c) (-37+17)-(-37-23)-40= -37+17+37+23-40=(37-37)+(17+23)-40= 0+40-40=0 tick mk
a) -2015 - 2016 + 2015 + 2017=( -2015 +2015 ) + ( -2016 +2017 )
= 0 + 1
= 1
b) -16 + 17 - 34 - 17= ( - 16 - 34 ) + ( 17 - 17 )
= - 50 + 0
= -50
c) -37 + 17 + 37 + 23 - 40 = ( -37 + 37 ) + ( 17 + 23 ) - 40
= 0 + 40 - 40
= 0
a)- 2015.2+(2016+2017) = 8063
b)- (-16+-34)+(-17+-17) = -84
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