Efectuati :

a) (-13) + (+15) - (-7) + (+10) - (-23) =
b) (-26) - (-13) + (+28) - (+55) =
c) [(-17) - 0] - [(+2) - (+0)] - {(-2) - [(+14) - 0 ]}
d) - 46 - { - 69 + [-57 +(+75) + (-12)] + (-13)} + (+57).





HELP! :C

2

Răspunsuri

2014-09-28T19:47:26+03:00
A) - 13 + 15 + 7 + 10 + 23 = 42
b) - 26 + 13 + 28 - 55 = - 40
c) - 17 - 2 +16 = - 3
d) - 46  - (- 69 + 6 - 13) + 57 = - 46 + 76 + 57 = 87
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2014-09-28T19:50:18+03:00
A) (-13) + (+15) - (-7) + (+10) - (-23) = -13+15+7+10+23=2+7+10+23=+42
  b) (-26) - (-13) + (+28) - (+55) =-26+13+28-55=-13+28-55=+15-55=-40
  c) [(-17) - 0] - [(+2) - (+0)] - {(-2) - [(+14) - 0 ]}=-17-(2-0)-[-2-14]=-17-2-(-16)=-19+16=-3
  d) - 46 - { - 69 + [-57 +(+75) + (-12)] + (-13)} + (+57)=-46-[-69+(-57+57-12)-13]+57=-46-(-69-12-13)+57=-46-(-81-13)+57=-46-(-94)+57=-46+94+57=48+57=+105
    
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