796 - 387 = 800 - 390 = 800 - (400 - 10) = 800 - 400 + 10 = 400 + 10 = 410
122
1214
An upper bound estimate is a estimate that is greater than the actual solution.
It could estimate to 480 or even 500, depending on what way you want to estimate it to.
The estimate for 15,772 is 10,000
A ballpark estimate is a very rough approximation of a number, figure, or calculation.
How do you make a ballpark estimate of 7201 plus 6988?
i would say they way to get the ballpark estimate is by taking the number. and see what is the estimate for that number and then you take that estimated number and then add to get your answer .
150
6500
7200
370
136-79 with ballpark estimate and partial differences method = 57
ballpark
122
4900
860