## Algebra 1

The error is in the final step, which is the addition of a positive number and a negative number: $-4+5$ To add numbers with opposite signs, you find the difference of their absolute values and assign the sum the sign of the addend with the largest absolute value. $|5|\overset?\gt|-4|$ $5\gt4$ Subtract 4 from 5. Since the positive number, 5, has the largest absolute value, the sum will be positive. $5-4=1$