https://padlet.com/alipkuruzaki/p1dm0b0d6543 Mind map en-us 2019-02-18 00:48:14 UTC 2023-03-03 04:35:32 UTC hello@padlet.com https://padlet-assets.s3.amazonaws.com/icons/Rugbyball.png alipkuruzaki https://padlet.com/alipkuruzaki/p1dm0b0d6543/wish/332193895 -16th Century , Robert Recorde create an "=" symbols because he tired to write "equal to"

]]> 2019-02-18 00:49:38 UTC https://padlet.com/alipkuruzaki/p1dm0b0d6543/wish/332193895 alipkuruzaki https://padlet.com/alipkuruzaki/p1dm0b0d6543/wish/332194297 -to avoid repeating and avoid using many words 
-to write by short term

]]> 2019-02-18 00:52:45 UTC https://padlet.com/alipkuruzaki/p1dm0b0d6543/wish/332194297 alipkuruzaki https://padlet.com/alipkuruzaki/p1dm0b0d6543/wish/332194598 -to represent sets of number and equation 

]]> 2019-02-18 00:54:02 UTC https://padlet.com/alipkuruzaki/p1dm0b0d6543/wish/332194598 alipkuruzaki https://padlet.com/alipkuruzaki/p1dm0b0d6543/wish/332194763 - ! , factorial , is the product of all positive integers less than or equal to n
-π , specific number ( 3.142)
-x , multiplication 
-e, repeated multiplication 
-Σ , represent all range number

]]> 2019-02-18 00:55:10 UTC https://padlet.com/alipkuruzaki/p1dm0b0d6543/wish/332194763