2340
2,350
It is 2340.
Most schools wrongly teach you to always round 5 up (so the answer would be 2350) but, while this is a simple rule to teach, it is not really correct. Under this rule:
• if the following digit is 0 you don't round;
• if the following digit is 1, 2, 3 or 4 you round down; and
• if the following digit is 5, 6, 7, 8 or 9 you round up.
As a result you are more likely to round up than round down and that introduces an upward bias into your calculations.
The IEEE (Institute of Electronic and Electrical Engineers) standard 754 is to round 5 up or down so that the new last digit is even. See link for more: //en.wikipedia.org/wiki/Rounding#Round_half_to_even
2.345 rounded to the nearest ten is 0.
2350
2000
23500
2350
2.3
2340
It is 2350 when rounded to the nearest ten
2345
2,345 rounded to nearest thousands is 2,000
2300
It is: 2300
350
2350
60
It is then 740 when rounded to the nearest ten.
30
36,184 rounded to the nearest ten thousands place is 40,000.