Answer:
870,000
Step-by-step explanation:
When rounding lets take this problem as an example, you need to rely on the number that is right from it. In this case, it will be the number 3. Any number that is below 4 will be 870,000, any number that is above a 5 will be 880,000. Also note that rounding is always going to be 1-10 not 1-5. What I mean is people will do the mistake and say 873,711 will be rounded to 875,000 which is incorrect.
