Explicație pas cu pas:
a) 27 - (20-3) = 27- 17 = 10
27-(20-3) = 27-20+3 = 7 + 3 = 10
b) (ai deja rezolvat)
c) 100 - (300-200) = 100-100 = 0
100 - (300-200) = 100-300+200 = -200+200 = 0
d) 666- (555-111) = 666- 444 = 222
666- (555-111) = 666- 555 + 111 = 111 + 111 = 222
e)80- (19-9) = 80 - 10 = 70
80- (19-9) = 80- 19 + 9 = 61 + 9 = 70
f) 2012 - (2012-1012) =2012 - 1000 = 1012
2012 - (2012 - 1012) = 2012 - 2012 + 1012 = 0 + 1012 = 1012
Sper ca te-am ajutat!!
