ffirs.indd

(Brent) #1

185





    • = x 0 1 2 3 4 5 6 7 8 9 ( ) % < > + - = x 0 1 2 3 4 5 6 7 8 9 ( )
      % < > + - = x 0 1 2 3 4 5 6 7 8 9 ( ) % < > + - = x 0 1 2 3 4 5 6 7 8 9
      ( ) % < > + - = x 0 1 2 3 4 5 6 7 8 9 ( ) % < > + - = x 0 1 2 3 4 5 6 7 8
      9 ( ) % < > + - = x 0 1 2 3 4 5 6 7 8 9 ( ) % < > + - = x 0 1 2 3 4 5 6 7
      8 9 ( ) % < > + - = x 0 1 2 3 4 5 6 7 8 9 ( ) % < > + - = x 0 1 2 3 4 5 6
      7 8 9 ( ) % < > + - = x 0 1 2 3 4 5 6 7 8 9 ( ) % < > + - = x 0 1 2 3 4 5
      6 7 8 9 ( ) % < > + - = x 0 1 2 3 4 5 6 7 8 9 ( ) % < > + - = x 0 1 2 3
      CChapter 19hapter 19
      DDIRECT IRECT
      M MULTIPLICATIONULTIPLICATION
      Everywhere I teach my methods I am asked, how would you multiply
      these numbers? Usually I will show people how to use the methods
      you have learned in this book, and the calculation is quite simple.
      Th ere are often several ways to use my methods, and I delight in
      showing diff erent ways to make the calculation simple.
      Occasionally I am given numbers that do not lend themselves to my
      methods with a reference number and circles. When this happens,
      I tell people that I use direct multiplication. Th is is traditional
      multiplication, with a diff erence.
      MULTIPLICATION WITH A DIFFERENCE
      For instance, if I were asked to multiply 6 times 17, I wouldn’t use
      my method with the circles, as I think it is not the easiest way to
      solve this particular problem. I would simply multiply 6 times 10
      and add 6 times 7.



Free download pdf