Răspuns :
35+36+37+38+39+40+41+42+43+44= 395
= 35 + ( 36 + 44) + ( 37 + 43) + ( 38 + 42) + ( 39 + 41) + 40=
= 35 + 80 + 80 + 80 + 80 + 40=
= 75 + 320 =
= 395
Obs. Am aplicat asociativitatea, ca proprietate a adunarii !
= 35 + ( 36 + 44) + ( 37 + 43) + ( 38 + 42) + ( 39 + 41) + 40=
= 35 + 80 + 80 + 80 + 80 + 40=
= 75 + 320 =
= 395
Obs. Am aplicat asociativitatea, ca proprietate a adunarii !