1. ROUNDING NUMBERS

2. RULES For Rounding Off Numbers
(Round the following numbers to three sig fig).
If the digit to the immediate right of the last sig fig
is less than five, do not change, let rest.
2.532
2.53
If the digit to the immediate right of the last sig fig is
greater than five, round up the last sig fig.
2.536
2.54

3. Even ….. Leave it
Odd …. Round up

4. RULES For Rounding Off Numbers
(Round the following numbers to three sig fig).
If the digit to the immediate right of the last sig fig is equal
to five and is followed by a nonzero digit, round up.
2.5351
2.54
If the digit to the immediate right of the last sig fig is equal to five and is followed by a zero, look at the last sig fig.
If it is odd digit, round it up. 51 52 53 54 55 56 57 58 59
Odd….round up
2.5350
2.54
If it is an even digit, do not round it up; leave it!
2.5250
2.52
Even….leave it
2.5349
2.53

5. Example:
81.889(three)
81.9

6. Example:
65.824(three)
65.8

7. Example:
843 (two) 84
840

8. Example:
3,381 (two)
3,400 34

9. Example:
48 (one) 50

10. Example:
(three)

11. Example:
5.7849(three)
5.78

12. Example:
(three)
5.79

13. Example:
(three)
5.78

14. Example:
(three)
5.74

15. WHITEBOARD
PRACTICE

16. Practice:
889 (one)
900

17. Practice:
485 (two)
480

18. Practice:
19.848(three)
19.8

19. Practice:
35.624(two) 36

20. Practice:
88 (one) 90

21. Practice:
7,751 (two)
7,800

22. Practice:
85 (one) 80

23. Practice:
(three)

24. Practice:
(one)

25. Practice:
(one)

26. Practice:
(one)

27. Practice:
75,091 (one)
80,000