Question

Efectuati :

a) ( -13 ) + (+15 ) - ( -7 ) + ( +10 ) - (-23 ) = ?  ( la sfarsitul manualului imi zice ca este egal cu 42 :)) )

b) (-26) - ( -13 ) + ( +28 ) - ( +55 ) = ? ( sfarsit = -40 )

c) [( -17 ) - 0 ] - [( +2) - (+0 )] - {(-2) - [( +14)- 0] } = ? (sfarsit = -3 :)))) )

d) -46 - { -69 + [-57 + (+75) + (-12)] + (-13)} + (+57) = ? ( sfarsit = 87 ) 

Multumesc , cat mai repedeee ! :***

Answer 1

a) 2- (-7) + (+10) - (-23)= 9+ (+10) - (-23)= 19- (-23)=42
b)-39+ (+28)-(+55)= -11 - (+55)= -40
C)=-3
d)87

Answer 2

a)(-13)+(+15)-(-7)+(+10)-(-23)=-13+15+7+10+23=42
b)(-26)-(-13)+(+28)-(+55)=-26+13+28-55=41-81=-40
c)[(-17)-0]-[(+2)-(+0)]-{(-2)-[(+14)-0]}=
=-17-2-[(-2)-(+14)]=
-17-2-(+12)=
=-17-2-12=
=-31
d)-46-{-69+[-57+(+75)+(-12)]+(-13)}+(+57)=
-46-[-69+(-57+75-12)-13]+57=
-46-(-69+6-13)+57=
-46++76+57=
87
este cel mai bun raspuns?