Answer
Answer:
Estimate = 426
Final = 444.86
Work Step by Step
Using front end rounding let's first round off the each number
5.81 (rounds to) 6
423.96 (rounds to) 400
15.09 (rounds to) 20
Now we find estimate
6
+ 400
+ 20
______
426
Now we find the exact answer
1 1 1
5.81
+ 423.96
+ 15.09
_______
444.86