54+86
2.0999999999999996
Sum is the result of an addition problem, while difference is the result of a subtraction problem. Addend Subtractend + Addend - Subtractor Sum Difference
1,400
The sum is 2.05 and you don;t need to estimate such a simple sum!
rounding
54+86
2.0999999999999996
5.13+2.28=7.41
7.000
10.91
Sum is the result of an addition problem, while difference is the result of a subtraction problem. Addend Subtractend + Addend - Subtractor Sum Difference
1,400
Notice that each of the three numbers is rather close to 9,000. The estimated sum is 27,000.
The sum is 2.05 and you don;t need to estimate such a simple sum!
21964
800