14200
209
1 + 7 = 8
That equals 559. If you have to, estimate 210 + 350 = 560
15.90 + 90 = 16.80
3 + 4 = 7
How do you make a ballpark estimate of 7201 plus 6988?
1214
600
33
600
209
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.
1330 plus 900
520.
120+220
23.40
200+100