Dapatkan tips-tips yang mudah untuk belajar matematik.....anda pasti menyukai subjek matematik nanti...blog ini khas buat pelajar-pelajar kesayanganku....di harap dapat memberi manfaat kepada kalian semua...AMeeN....
Friday, 18 May 2012
Only works if first digits are the same, and both last digits sum up 10
33 x 37 -> 3+7=10 (first digits = 3)
56 x 54 -> 6+4=10 (first digits = 5)
21 x 29 -> 1+9=10 (first digits = 2)
112 x 118 ->2+8=10 (first digits = 11)
Only works if first digits are the same, and both last digits sum up 10
33 x 37 -> 3+7=10 (first digits = 3)
56 x 54 -> 6+4=10 (first digits = 5)
21 x 29 -> 1+9=10 (first digits = 2)
112 x 118 ->2+8=10 (first digits = 11)