Answer
Estimate: 8 + 80 + 40 = 128
Exact: 129.2028
Work Step by Step
7.6 + 82.0128 + 39.59
Let's first find the Estimate:
7.6 (rounded to) 8
82.0128 (rounded to) 80
39.59 (rounded to) 40
7.6 + 82.0128 + 39.59 = 8 + 80 + 40 = 128
Now, Lets find exact:
7.6
+ 82.0128
+ 39.59
i.e.
111
7.6000
+ 82.0128
+ 39.5900
________
129.2028
