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Rounding to the Nearest 100 (Larger Numbers) www.seomraranga.com.

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Presentation on theme: "Rounding to the Nearest 100 (Larger Numbers) www.seomraranga.com."— Presentation transcript:

1 Rounding to the Nearest 100 (Larger Numbers)

2 Decide: Which two hundreds is the number between Which hundred is it nearest to Rounding to the Nearest 100

3 Rules : If it ends in a number between 1 and 49 round to the hundred before If it ends in a number between 51 and 99, round to the hundred after If it ends in 50 (which is half way between two hundreds) always round up to the higher hundred Rounding to the Nearest 100

4 Example 1 Round off 2143 It is between 2100 and 2200 It ends in 43, so it rounds down to 2100 (You only have to go back 43 to get to 2100, but you would have to go forward 57 to get to 2200) Rounding to the Nearest 100

5 Example 2 Round off 7456 It is between 7400 and 7500 It ends in 56, so it rounds up to 7500 (You only have to go forward 44 to get to 7500, but you would have to go back 56 to get to 7400) Rounding to the Nearest 100

6 Example 3 Round off 8750 It is between 8700 and 8800 It ends in 50, so it rounds up to 8800 (The rule is that when it ends in 50, it is half way between the two hundreds, so you always round up to the higher hundred) Rounding to the Nearest 100

7 1255 Rounds to 1300

8 Rounding to the Nearest Rounds to 3400

9 Rounding to the Nearest Rounds to 8400

10 Rounding to the Nearest Rounds to 5300

11 Rounding to the Nearest Rounds to 9200

12 Now try to round off the following numbers to the nearest 100 using the rules: Rounding to the Nearest 100

13 2129 Rounds to ?

14 Rounding to the Nearest Rounds to ?

15 Rounding to the Nearest Rounds to ?

16 Rounding to the Nearest Rounds to ?

17 Rounding to the Nearest Rounds to ?

18 Rounding to the Nearest Rounds to ?

19 Rounding to the Nearest Rounds to ?

20 Rounding to the Nearest Rounds to ?

21 Rounding to the Nearest Rounds to ?

22 (a) 2214 (b) 5347 (c) 4244 (d) 2757 (e) 6198 (f) 7122 (g) 8819 (h) 1254 (i) 7150 (j) 3363 (k) 2865 (l) 4444 (m) 3216 (n) 7812 (o) 5499 (p) 4828 (q) 1559 (r) 7008 (s) 5531 (t) Round off these numbers to the nearest 100 in your copy:


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