Estimating and approximating

There are 59 NRICH Mathematical resources connected to Estimating and approximating
Fruity Pairs
problem
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Fruity pairs

Age
5 to 7
Challenge level
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Which two items of fruit could Kate and Sam choose? Can you order the prices from lowest to highest?

Count the Crayons
problem
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Count the crayons

Age
5 to 7
Challenge level
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How could you estimate the number of pencils/pens in these pictures?
Olympic Measures
problem
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Olympic measures

Age
11 to 14
Challenge level
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These Olympic quantities have been jumbled up! Can you put them back together again?
Can you do \it too?
problem
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Can you do it too?

Age
5 to 7
Challenge level
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Try some throwing activities and see whether you can throw something as far as the Olympic hammer or discus throwers.

Discuss and Choose
problem
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Discuss and choose

Age
5 to 11
Challenge level
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This activity challenges you to decide on the 'best' number to use in each statement. You may need to do some estimating, some calculating and some research.

Little Man
problem
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Little man

Age
5 to 7
Challenge level
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The Man is much smaller than us. Can you use the picture of him next to a mug to estimate his height and how much tea he drinks?
A question of scale
problem
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A question of scale

Age
14 to 16
Challenge level
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Use your skill and knowledge to place various scientific lengths in order of size. Can you judge the length of objects with sizes ranging from 1 Angstrom to 1 million km with no wrong attempts?
Countdown
game
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Countdown

Here is a chance to play a version of the classic Countdown Game.

Power Countdown
problem
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Power countdown

Age
14 to 16
Challenge level
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In this twist on the well-known Countdown numbers game, use your knowledge of Powers and Roots to make a target.