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ROUNDING NUMBERS.

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Presentation on theme: "ROUNDING NUMBERS."— Presentation transcript:

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


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