All the Math You'll Ever Need: A Self-Teaching Guide, Revised Edition (Wiley Self-Teaching Guides) Paperback – 29 Mar. 1999

So I'm a recent english learner and I'm new to maths as well. I have spend past week mastering the x table and have always been pretty good at addition. Although I seem to be missing some functional skills and am going to be sitting my GCSE soon. My question is, how on earth dose 623+445 become 5073? Is there something I'm missing here? I'm still now researching the concept of adding a 0 at the end of things is that why my calculator and brain keep telling me the answer to be 1068? Or is this book faulty? Iv really been enjoying the guidance and all but cant move past this, I'm missing something here please help guys an gals.

Do you want to be able to do tough maths questions in your head without using your fingers. Get this book now. People will think your a maths genius.