3) -9 1/2 + (-2 3/4) = -12,25
4) +51 1/9 + (-51 1/9) = 0 либо -51 1/9 + (+51 1/9) = 0
5) +5,81 + (-3,25) = 2,56
6) +150 + (-250) = -100
3) -9 1/2 + (-2 3/4) = -12,25
4) +51 1/9 + (-51 1/9) = 0 либо -51 1/9 + (+51 1/9) = 0
5) +5,81 + (-3,25) = 2,56
6) +150 + (-250) = -100