The procedure here, for each "evaluation", is broken down into three parts:
1. to get rid of the minus signs,
2. to solve the resulting sum as usual (for the decimal number case), and
3. adding a minus to the result of the second step.
Note: This can be done for the values of y are all negative and -15.85 is negative.
y=-63.06) Step one gives us:
Step two gives us:
And finally, step three gives us:
y=-84.703) Step one gives us:
Step two gives us:
And step three gives us:
y=-8.115) Step one gives us:
Step two gives us:
And step three gives us:
Comment: Don't forget to add the minus sign at the end.