1o1’s

Basic Needs:

You need to remember all this things before we do some really handy stuff.

  • Whole number = {0,1,2,3,4,……}
  • Integers = {…….,-3,-2,-1,0,1,2,3,……..}
  • Real number = {……,2.8,-2,-10,1,1.9,-2,3,3.12,…….}
  • Even number = {0,2,4,6,8,……}
  • Odd number = {1,3,5,7,9,……..}
  • Prime number = {2,3,5,7,9,11,13,17,19,……..}
  • (a + b) = a+ 2ab + b
  • (a – b) = a– 2ab + b
  • (a – b) = (a+b)(a-b)