Rounding Numbers. 6 7 8 6.3 7.2 7.8 2035 = 2040 8985 = 9000 6.89 = 6.9 67 890 = 68 000.

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Presentation transcript:

Rounding Numbers = = = =

Rounded Numbers All Around You. Here are some examples of rounded numbers which could appear in newspaper headlines: Watch Scotland Win Again. Man Leaves £2 Million To Charity March In War Protest.

Rounding To The Nearest Whole Number. Consider the number : 6.7 It is our task to decide if the number is closer to : 6 or 7 Look at the number line below: Mark the number Mark the number Is 6.7 closer to 6 or 7 ? 6.7 = 7 (to the nearest whole number) 6.5 is the midpoint between 6 and 7. Is 6.7 above or below 6.5 ?Above

Further Example. Round the following to the nearest whole number: (1) What is the midpoint between 24 and 25 ? 24.5 Is 24.3 above or below 24.5 ? 24.3 Below = 24 (To the nearest whole number).

What Goes In The Box ? Round the following to the nearest whole number: (1) 4.8 (2) 7.4 NB: always round 0.5 up. Ie 12.5 = 13 (to the nearest whole number). (3) 44.6 (4) 87.5 (5) 56.3 (6) (7) 9.8 (8) 49.6 (9) 99.7 (10)