## Number sense

## Number sense

## Number sense

Number sense is considered as an innate numeracy skill, which not only humans but also some animals, such as fish and birds have. As the name says, it refers to sense of numbers. Number sense enables us to estimate the number of cars on the parking lot without counting them on-by-one, or to tell whether there are more people queueing in one line or in the other one.

APPROXIMATE NUMBER SYSTEM (ANS)

It has been proposed that we use a system called approximate number system, ANS, when estimating magnitudes (e.g. object or dots) approximately, or making comparisons of numbers (1).

When testing what kind of number sense an individual has, researchers often use tasks, in which you need to compare a number of dots or number symbols. Those who have a good number sense often respond quicker and more accurately in these tasks compared to those with weaker number sense.

Look at the pictures.

Can you quickly estimate which of the pictures has more dots?

Number sense is considered as an innate numeracy skill, which not only humans but also some animals, such as fish and birds have. As the name says, it refers to sense of numbers. Number sense enables us to estimate the number of cars on the parking lot without counting them on-by-one, or to tell whether there are more people queueing in one line or in the other one.

APPROXIMATE NUMBER SYSTEM (ANS)

It has been proposed that we use a system called approximate number system, ANS, when estimating magnitudes (e.g. object or dots) approximately, or making comparisons of numbers (1).

When testing what kind of number sense an individual has, researchers often use tasks, in which you need to compare a number of dots or number symbols. Those who have a good number sense often respond quicker and more accurately in these tasks compared to those with weaker number sense.

Look at the pictures.

Can you quickly estimate which of the pictures has more dots?

Number sense is considered as an innate numeracy skill, which not only humans but also some animals, such as fish and birds have. As the name says, it refers to sense of numbers. Number sense enables us to estimate the number of cars on the parking lot without counting them on-by-one, or to tell whether there are more people queueing in one line or in the other one.

APPROXIMATE NUMBER SYSTEM (ANS)

It has been proposed that we use a system called approximate number system, ANS, when estimating magnitudes (e.g. object or dots) approximately, or making comparisons of numbers (1).

When testing what kind of number sense an individual has, researchers often use tasks, in which you need to compare a number of dots or number symbols. Those who have a good number sense often respond quicker and more accurately in these tasks compared to those with weaker number sense.

Look at the pictures.

Can you quickly estimate which of the pictures has more dots?

## iSeeNumbers in X'mas calendar 2020

Each day, until December 24th, you will find a math task in the calendar, which can be solved together in a classroom.

The tasks have been designed for grades 1–3, but can also be used in other grades, if and when suitable. When solving the problems, it might be good to draw it or use some manipulatives.

Each correctly solved math problem will give you a letter. These letters form words, but the letters are first mixed in a word. For example, "doog romnnig" would be "good morning". In the end, when having all six words, you should get a name for a Christmas song.

The first word has 5 letters (these letters are from the tasks 1–5).

The second word has 5 letters.

The third word has 2 letters.

The fourth word has 6 letters.

The fifth word has 2 letters.

The sixth word has 4 letters.

Note. Calendar created by Fride Lillsdatter Ludvigsen, Matin Younesi & Riikka Mononen.