Question

Calculati 125+71+1249, 1+2+3...+100, 10•{8•(127• 8 - 78 • 12) -453

Answer 1

125+71+1249 = 1445


 1+2+3...+100 = suma Gauss S=[n(n+1)]:2=[100×(100+1)]:2= 5050


10×{8×(127× 8 - 78× 12) - 453

=10×{8×(1016 - 936) - 453

= 10 × [{8×80) - 453

=10×(640 - 453)

=10×187

=1870