Round down 5 to 0 so it is still the same like if the number is 234 that means round down means it turns to 200 only but round up is 6 to 9 so plus one that means if the given number is 2,789 so in equal the answer is 3,000 it is round off to the highest value but if you are rounding off to the nearst ten and the number was 245 this means the answer is 240 so this means every value is always free to round off.If this is helpful to you then YOUR WELCOME!!