Question

420,983 estimate it then estimate 39,932 then you have to add thoes then you have to add that and that and then you have to add 420,983 plus 39,932 and see if your answer is close to the estimate

Answer 1

The answer may appear short but it is simple and pure math: 421,000 + 40,000 = 461,000 You estimate first number, then second, then add them together.