who actually made addition? like as in, who invented addition?

The process of addition was first thought of by the Chinese a long, long, long time ago! They used something called an abacus to add things up, because the addition sign was not created until 1544.

Who actually created the idea of fractions,because they are like so helpful?

Fractions were invented more than likely by the Egyptians to organize taxes on land.

At 0:04, Sal mentions adding numbers. How was this invented, and how were the numbers to add stuff invented?

Adding numbers was most likely founded from Greek Philosophy, same as the numbers. Great question!

Which one is easier subtraction or addition?

Personally addition but they are both farily easy.

how many numbers can you add at the same time?

You can add as many numbers at once as you want.

How would you add in different number bases?

That is a really good question. The grade level for counting in different bases is like algebra, but I can give u a link to it https://www.khanacademy.org/math/algebra-home/alg-intro-to-algebra/algebra-alternate-number-bases/v/number-systems-introduction https://www.khanacademy.org/math/algebra-home/alg-intro-to-algebra/algebra-alternate-number-bases/v/hexadecimal-number-system https://www.khanacademy.org/math/algebra-home/alg-intro-to-algebra/algebra-alternate-number-bases/v/decimal-to-binary https://www.khanacademy.org/math/algebra-home/alg-intro-to-algebra/algebra-alternate-number-bases/v/large-number-decimal-to-binary https://www.khanacademy.org/math/algebra-home/alg-intro-to-algebra/algebra-alternate-number-bases/v/binary-addition https://www.khanacademy.org/math/algebra-home/alg-intro-to-algebra/algebra-alternate-number-bases/v/binary-multiplication This is all in algebra! Hope this answers your question!!

Where did the symbols for additional (+) and subtraction (-) come from?

The plus and minus signs (+ and −) are mathematical symbols used to represent the notions of positive and negative as well as the operations of addition and subtraction. Nicole Oresme's manuscripts from the 14th century show the earliest uses of the plus sign (+). The − may be derived from a tilde written over m when used to indicate subtraction, or it may come from a shorthand version of the letter m itself. The alphabet 'm' was used as the minus sign in the Europe until these symbols were intoduced

why are certain skills so hard!

Don't worry, just keep practicing and practicing and soon you will get it.

Main content

Kindergarten

Course: Kindergarten > Unit 2

Lesson 1: What is addition? What is subtraction?

Intro to addition

Name: Intro to addition
Uploaded: 2014-04-25T19:24:36Z
Description: Learn what it means to add. The examples used are 1+1 and 2+3.

Google Classroom

Learn what it means to add. The examples used are 1+1 and 2+3. Created by Sal Khan.

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Kevin Nguyen(troller95)
Posted 9 years ago. Direct link to Kevin Nguyen(troller95)'s post “who actually made additio...”
who actually made addition? like as in, who invented addition?
Button navigates to signup pageComment on Kevin Nguyen(troller95)'s post “who actually made additio...”
(139 votes)
Answer
- Joseph Jonathan
  Posted 9 years ago. Direct link to Joseph Jonathan's post “The process of addition w...”
  The process of addition was first thought of by the Chinese a long, long, long time ago!
  
  They used something called an abacus to add things up, because the addition sign was not created until 1544.
  Comment on Joseph Jonathan's post “The process of addition w...”
  (125 votes)
reahal1424
Posted 6 years ago. Direct link to reahal1424's post “Who actually created the ...”
Who actually created the idea of fractions,because they are like so helpful?
Button navigates to signup pageComment on reahal1424's post “Who actually created the ...”
(48 votes)
Answer
- Kirsten
  Posted 6 years ago. Direct link to Kirsten's post “Fractions were invented m...”
  Fractions were invented more than likely by the Egyptians to organize taxes on land.
  Comment on Kirsten's post “Fractions were invented m...”
  (62 votes)
NumerousSeven
Posted 5 years ago. Direct link to NumerousSeven's post “At 0:04, Sal mentions add...”
At
0:04
, Sal mentions adding numbers. How was this invented, and how were the numbers to add stuff invented?
Button navigates to signup pageButton navigates to signup page
(13 votes)
Answer
- Jace D
  Posted 5 years ago. Direct link to Jace D's post “Adding numbers was most l...”
  Adding numbers was most likely founded from Greek Philosophy, same as the numbers. Great question!
  Comment on Jace D's post “Adding numbers was most l...”
  (7 votes)
Jambone
Posted 6 years ago. Direct link to Jambone's post “Where did the symbols for...”
Where did the symbols for additional (+) and subtraction (-) come from?
Button navigates to signup pageComment on Jambone's post “Where did the symbols for...”
(3 votes)
Answer
- Katyayani
  Posted 6 years ago. Direct link to Katyayani's post “The plus and minus signs ...”
  The plus and minus signs (+ and −) are mathematical symbols used to represent the notions of positive and negative as well as the operations of addition and subtraction. Nicole Oresme's manuscripts from the 14th century show the earliest uses of the plus sign (+). The − may be derived from a tilde written over m when used to indicate subtraction, or it may come from a shorthand version of the letter m itself. The alphabet 'm' was used as the minus sign in the Europe until these symbols were intoduced
  Button navigates to signup page
  (22 votes)
Michelle
Posted 6 years ago. Direct link to Michelle's post “Which one is easier subtr...”
Which one is easier subtraction or addition?
Button navigates to signup pageComment on Michelle's post “Which one is easier subtr...”
(6 votes)
Answer
- carefarrar
  Posted 6 years ago. Direct link to carefarrar's post “Personally addition but t...”
  Personally addition but they are both farily easy.
  Comment on carefarrar's post “Personally addition but t...”
  (11 votes)
Emcee_Rap
Posted 4 years ago. Direct link to Emcee_Rap's post “how many numbers can you ...”
how many numbers can you add at the same time?
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(5 votes)
Answer
- Mr. Ananamous
  Posted 4 years ago. Direct link to Mr. Ananamous's post “You can add as many numbe...”
  You can add as many numbers at once as you want.
  Comment on Mr. Ananamous's post “You can add as many numbe...”
  (8 votes)
NumerousSeven
Posted 4 years ago. Direct link to NumerousSeven's post “How would you add in diff...”
How would you add in different number bases?
Button navigates to signup pageButton navigates to signup page
(4 votes)
Answer
- Samuel
  Posted 4 years ago. Direct link to Samuel's post “That is a really good que...”
  That is a really good question. The grade level for counting in different bases is like algebra, but I can give u a link to it
  https://www.khanacademy.org/math/algebra-home/alg-intro-to-algebra/algebra-alternate-number-bases/v/number-systems-introduction
  
  https://www.khanacademy.org/math/algebra-home/alg-intro-to-algebra/algebra-alternate-number-bases/v/hexadecimal-number-system
  
  https://www.khanacademy.org/math/algebra-home/alg-intro-to-algebra/algebra-alternate-number-bases/v/decimal-to-binary
  
  https://www.khanacademy.org/math/algebra-home/alg-intro-to-algebra/algebra-alternate-number-bases/v/large-number-decimal-to-binary
  
  https://www.khanacademy.org/math/algebra-home/alg-intro-to-algebra/algebra-alternate-number-bases/v/binary-addition
  
  https://www.khanacademy.org/math/algebra-home/alg-intro-to-algebra/algebra-alternate-number-bases/v/binary-multiplication
  This is all in algebra! Hope this answers your question!!
  Comment on Samuel's post “That is a really good que...”
  (6 votes)
khanacademy271
Posted 3 years ago. Direct link to khanacademy271's post “How is addition like coun...”
How is addition like counting?
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(5 votes)
Answer
- Esteban
  Posted 3 years ago. Direct link to Esteban's post “When counting you are add...”
  When counting you are adding by 1.
  For example, when counting 1, 2, 3, 4, 5, etc., you can represent every number as an addition: 1, 1+1, 1+1+1, 1+1+1+1, 1+1+1+1+1, etc.
  Button navigates to signup page
  (1 vote)
ᵀʰᵒᵐᵃˢ
Posted 6 years ago. Direct link to ᵀʰᵒᵐᵃˢ's post “Well, at 0:55 if that's h...”
Well, at
0:55
if that's how addition works, then what is 1,007,458 + 76,943?
Button navigates to signup pageComment on ᵀʰᵒᵐᵃˢ's post “Well, at 0:55 if that's h...”
(4 votes)
Answer
- mlar4775
  Posted 3 months ago. Direct link to mlar4775's post “You need to do that on pa...”
  You need to do that on paper or use a calculator but it is 1084401
  Button navigates to signup page
  (1 vote)
Jacob
Posted 8 years ago. Direct link to Jacob's post “why are certain skills so...”
why are certain skills so hard!
Button navigates to signup pageComment on Jacob's post “why are certain skills so...”
(3 votes)
Answer
- Niharika
  Posted 6 years ago. Direct link to Niharika's post “Don't worry, just keep pr...”
  Don't worry, just keep practicing and practicing and soon you will get it.
  Comment on Niharika's post “Don't worry, just keep pr...”
  (3 votes)

Video transcript

Voiceover:Let's think about what it means to add numbers. So let's start with 1. 1 plus. 1 plus 1. What is this going to be equal to? One way to think about this is we have 1 thing, and that thing will be a purple circle. So let me put that here. So that's this 1 thing. I'm just going to represent it with a purple circle. And I'm going to add another 1 thing. And since this is in blue, I'll make that other circle, I'll make that in blue as well. So let me put that right over here. So 1 plus 1. 1 plus 1. How many total circles do I now have? Well, I now have 2 circles. I now have 2 circles. 1 plus 1 is equal to, is equal to 2. Okay, you're saying all right Sal, all right, that makes sense. Let's do this with larger numbers. So let's say we want to know what equals ... And I'll put a question mark over here. So, question mark. What equals ... So something is equal to, is equal to, let's say, 2, 2, 2 plus 3. Something is equal to 2 plus 3. What is this something going to be? I encourage you to pause the video and think about it on your own. Well, you could view this as, I have 2 objects and then we're going to add another 3 objects. How many total objects would I have? So you have your 2 objects, which I'll use purple circles again. So let me ... Let me, so, we have 1 and 2 purple circles. This is the 2 right over here. And then to that we're going to add 3 more. 3 more circles. I'll represent those in blue because we wrote the 3, here, in blue. So that is 1, 2, and 3. So how many total circles do we now have? Well, we could count them. We have 1, 2, 3, 4, 5. In fact, let me count that. 1, 2, 3, 4, 5 circles. So 2 plus 3. 2 things plus another 3 things are 5 things. So our question mark, right over here, is equal to 5. So instead of writing the question mark right over here, let me clear that out. I could say 5 is equal to. I could write down that 5 is equal to 2 plus 3.