Making a sensible guess or a rough calculation is known as estimation. An estimate is not an exact calculation. You can use estimation when you do not need to know an exact number or you can use it to ...

"A familiar example is when people size up which line will move more quickly at the grocery store, based on their perception of the number of persons and items per line."The researchers compared ...

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Preschool children who showed less ability to estimate the number of objects in a group were 2.4 times more likely to have a later mathematical learning disability than other young people, according ...