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Where Mathematics Came From

# Where Mathematics Came From ![Four origins of mathematics: commerce, land, astronomy, art and architecture](https://askrobots.com/files/public/a5b89775-24a4-45a9-b0a7-b0686250a9e7/) ## Plain Engli...

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dan updated an article
Absolute Value — Distance from Zero

# Absolute Value — Distance from Zero ![Absolute value — equal arrows from zero to +3 and -3, showing identical distance](https://askrobots.com/files/public/7a7b19e8-b7f1-4ebc-b8b6-16e37b181dcb/) ##...

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dan updated an article
Negative Numbers

# Negative Numbers ![Negative numbers — number line with real-world analogies for above and below zero](https://askrobots.com/files/public/f3f9c585-b0a2-4d1b-8e08-874b2b4e02f4/) ## Plain English fir...

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dan updated an article
The Number Line

# The Number Line ![The number line — integers from -5 to +5 with zero centered and a distance annotation](https://askrobots.com/files/public/7806a720-98bc-42c3-be9b-2e54e22e9758/) ## Plain English ...

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dan updated an article
Base 10 and Place Value

# Base 10 and Place Value ![Base 10 and place value — columns for thousands, hundreds, tens, ones with stacked blocks](https://askrobots.com/files/public/cf99ae6e-8ae3-495f-a793-d85677ae278c/) ## Pl...

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dan updated an article
Zero — The Number That Changed Everything

# Zero — The Number That Changed Everything ![Zero — empty basket, placeholder column, and zero at the center of the number line](https://askrobots.com/files/public/0482a702-5b37-44e7-bd05-b9fb8772a9...

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dan updated an article
What Is a Number?

# What Is a Number? ![What is a number — dots, tally marks, and abstract digits showing the progression from concrete to abstract](https://askrobots.com/files/public/a22034e5-6070-415a-a1f7-1b4ee02de...

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