Estimation of approximately 913100
Actual result 913101
1) To estimate that sum is to calculate it by rounding the figures. In the estimation we'll look for "rounded numbers" those ended on 0 or 5
2)We can round down 744,201 to 744200
168,900 let's keep it the way it is, for it is already rounded.
744,200 +168900
744 200 + 168900
913100
913100 what it is slightly close to the actual sum of those figures 913101