210
439 + 71 = 510
The ballpark estimate for 439 plus 71 can be simplified by rounding both numbers. Rounding 439 to 440 and 71 to 70 gives us 440 plus 70, which equals 510. Therefore, the ballpark estimate for 439 plus 71 is approximately 510.
439 + 71 = 439 + 1 + 70 = 440 + 70 = 510. Who needs a ball park estimate when the exact answer is just as easy to find?
520.
nothing at all
sava
680 + 440 = 1120
It is 71 + 30 = 101.
5200 and 70
You can see clearly that the actual answer is 722 but if you have to, estimate 790 - 70 = 720
The positive integer factors of 439 are: 1, 439
1 and 439. 439 is prime.