1- 1= 1x1 2 - 2 = 1x2 3- 3 = 1x3 4- 4 = 1x4 5- 5= 1x5 6- 6 = 1x6 7- 7= 1x7 8- 8 = 1x8 9- 9= 1x9 10- 10=1x10 11- 2 = 2x1 12- 4=2x2 13- 6=2x3 14- 8=2x4 15- 10=2x5 16- 12=2x6 17- 14=2x7 18- 16=2x8 19- 18=2x9 20- 20 =2x10 21- 3=3x1 22- 6 =3x2 23- 9=3x3 24- 12=3x4 25- 15=3x5 26- 18=3x6 27- 21=3x7 28- 24=3x8 29- 27=3x9 30- 30=3x10 وشكرا............................
