can somebody please provide a step-by-step,very basic explanation of how to do integers

Question

I am learning integers for the first time math is my worst subject I've never done algebra or geometry or anything I need a very basic simple first grade step by step breakdown on how to do integers.

Answer 1

1+1=2, 1+2=3, 1+3=4, 1+4=5

1*1=1, 2*2=4, 3*3=9, 4*4=16, 5*5=25, 7*7=49, 11*11=121, 12*12=144

sqrt(2)=1.414213562

1/2=0.5