9th grade - David Q, Tuesday, September 2, 2008 at 3:34pm
In "Principia Mathematica", Alfred North Whitehead and Bertrand Russell succeed in proving that 1+1=2 on page 379 of Volume 1. I would imagine the proof of the above proposition can be found somewhere between the start of the book and page 378.
9th grade - GuruBlue, Tuesday, September 2, 2008 at 3:34pm
The quantity on one side of an equals sign is identical to the quantity on the other side.
9th grade - alyshan, Wednesday, September 3, 2008 at 1:59pm
= means that 1 is equal to 1 (suppose that there is X and its given that X=5 , so the value of X is equal to 5)