48,369 + 39,231 = 87,600 (this is exact and not an estimate).
It is difficult to provide an answer asking us to estimate, as we do not know how accurate you would like our estimation to be.
For example we could, easily, estimate that the answer is 50,000 + 40,000 = 90,000 (here we have rounded each figure to the nearest 10,000).
Or we could round to the nearest 1000 for a closer approximation, i.e. 48,000 + 39,000 = 87,000 and so forth...
300+60=360
2048
4+1=5. Plus 4 equals 9. Plus 77685769844446473 equals 77685769844446482. Plus 3 equals 77685769844446485. Plus 8 equals 77685769844446493. Plus 1 equals 77685769844446494. Plus 9870998342523322424 equals 1064785604097768918. Plus 4 equals 1064785604097768922.
It is the property that equals plus equals are equals.
the answer is a
100 That is an estimate.
That equals 559. If you have to, estimate 210 + 350 = 560
nothing at all
If 8.81 + 2.78 = 8.8 plus Xthen, since 8.81 is nearly equal to 8.8 a good estimate for X is 2.78.
300+60=360
That equals 16.7 which would be between 15 and 18.
2048
42
To estimate a number you round it up to easier number so 387 would be 400. 945 would be 950 and 1024 would be 1030. so 400 and 950 would be 1350 plus 1030 equals 2380 you could even round it up easier so 400 plus 900 and 1000 equals 2300
360 + 40 + 35 = 435, nowhere close to 826.
4+1=5. Plus 4 equals 9. Plus 77685769844446473 equals 77685769844446482. Plus 3 equals 77685769844446485. Plus 8 equals 77685769844446493. Plus 1 equals 77685769844446494. Plus 9870998342523322424 equals 1064785604097768918. Plus 4 equals 1064785604097768922.
It is the property that equals plus equals are equals.