27 Interesting Facts About Mathematics
27 Interesting Facts About Mathematics Did You Know? 1. Abacus is considered the origin of the calculator. 2. 12,345,678,987,654,321 is the product of 111,111,111 x 111,111,111. Notice the sequence of the numbers 1 to 9 And back to 1. 3. Plus (+) and Minus (-) sign symbols were used as early as 1489 A.D. 4. …