Estimate. Then Find the sum.
740,758
-263,043
----------
700,000
-300,000
-------------
400,000
That's low, because we rounded down the minuend and rounded up the subtrahend.
400,000
To estimate the sum of 740,758 and -263,043, we can round both numbers to the nearest hundred thousand.
740,758 rounded to the nearest hundred thousand is 700,000.
-263,043 rounded to the nearest hundred thousand is -300,000.
Now, we can estimate the sum:
700,000 + (-300,000) = 400,000
To find the actual sum, we can subtract the numbers as presented:
740,758
-263,043
----------
477,715
So, the estimated sum is 400,000 and the actual sum is 477,715.