Answer:
Step-by-step explanation:
1 + ( -5) Adding a negative = subtracting:
= 1 - 5
= -4.
Think of these numbers as 'directed' numbers - the numbers depend on the direction.
If we have a thermometer and the temperature reads 1 degree and the temperature drops, the mercury travels down ( negative direction) by 5 units. . It goes down 1 degree to reach 0 then another 4 degrees to reach -4,
1 - 5 = -4.
