To practice your numbers click on the link below.
10-20 http://www.youtube.com/watch?v=e4dC6XaUbyg&feature=BFa&list=PL6B13C1EFB352C885&lf=plpp
20-30 http://www.youtube.com/watch?v=io0RMnMGSik&feature=BFa&list=PL6B13C1EFB352C885&lf=plpp
40-50 http://www.youtube.com/watch?v=J6wHzdH-Zdk&feature=BFa&list=PL6B13C1EFB352C885&lf=plpp
50-60 http://www.youtube.com/watch?v=hGQdQHMk6L8&feature=BFa&list=PL6B13C1EFB352C885&lf=plpp
60-70 http://www.youtube.com/watch?v=rr-CB5ujtFI&feature=BFa&list=PL6B13C1EFB352C885&lf=plpp
70-80 http://www.youtube.com/watch?v=9thj25JQYuI&feature=BFa&list=PL6B13C1EFB352C885&lf=plpp
80-90 http://www.youtube.com/watch?v=fgwTsVVja2c&feature=BFa&list=PL6B13C1EFB352C885&lf=plpp
90-100 http://www.youtube.com/watch?v=STbLKmnK5Js&feature=BFa&list=PL6B13C1EFB352C885&lf=plpp