a) |------| b) |------|////| c)|------|////|////| d) |------|////|////|////| suma in total este 820 ,acele 6 segmente hasurate sun de 90. 90×6=540, 820-540=280, 280÷4=70(a), 70+90=160(b) , 70+(90×2)=70+180=250(c) , 70+(90×3)=70+270=340(d). Verificare: 70+160+250+340=820