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**Rounding to the Nearest 100 (Larger Numbers)**

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**Rounding to the Nearest 100**

Decide: Which two hundreds is the number between Which hundred is it nearest to

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**Rounding to the Nearest 100**

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

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**Rounding to the Nearest 100**

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)

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**Rounding to the Nearest 100**

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)

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**Rounding to the Nearest 100**

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)

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**Rounding to the Nearest 100**

1255 Rounds to 1300

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**Rounding to the Nearest 100**

3429 Rounds to 3400

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**Rounding to the Nearest 100**

8448 Rounds to 8400

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**Rounding to the Nearest 100**

5250 Rounds to 5300

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**Rounding to the Nearest 100**

9177 Rounds to 9200

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**Rounding to the Nearest 100**

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

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**Rounding to the Nearest 100**

2129 Rounds to ?

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**Rounding to the Nearest 100**

5474 Rounds to ?

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**Rounding to the Nearest 100**

7131 Rounds to ?

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**Rounding to the Nearest 100**

4552 Rounds to ?

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**Rounding to the Nearest 100**

6591 Rounds to ?

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**Rounding to the Nearest 100**

2002 Rounds to ?

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**Rounding to the Nearest 100**

5598 Rounds to ?

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**Rounding to the Nearest 100**

1589 Rounds to ?

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**Rounding to the Nearest 100**

6350 Rounds to ?

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**Round off these numbers to the nearest 100 in your copy:**

(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) 3250

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Estimating Sums to the Nearest 10 and 100

Estimating Sums to the Nearest 10 and 100

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