oliver estimates 259 + 372 by rounding each number to the nearest 10, what is olivers estimate of the sum
To estimate the sum by rounding each number to the nearest 10, we need to round 259 and 372 to the nearest 10.
Rounding 259 to the nearest 10 gives us 260.
Rounding 372 to the nearest 10 gives us 370.
So, Oliver estimates 259 + 372 to be 260 + 370.
Adding these rounded numbers gives us:
260
+ 370
-------
630
Therefore, Oliver's estimate of the sum is 630.