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To find the pper bound we have to add half of the unit we rounded to for example:
If we rounded to the nearest 10, add 5 to find the upper bound and subtract 5 to find the lower bound.

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Upper and Lower Bounds | Number | Maths | FuseSchool

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In this video we discover what bounds. All measurements are approximate. Measurements are given to the nearest practical unit, like a cm or mm or gram. There is then a group of numbers that the original measurement is somewhere between. This is the limits of accuracy.

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Upper and lower bounds - Approximation - Edexcel - GCSE Maths Revision - Edexcel - BBC Bitesize

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Learn about and revise approximation using a range of rounding and estimation techniques with this BBC Bitesize GCSE Maths Edexcel study guide.

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