3/4 x 8/9 x 15/16 x ................ x 9/100
3/4 x 8/9 x 15/16 x ..... x 80/81 x 99/100
3/4 x 8/9 x 15/16 x.....x 80/81 x 99/100
3/4 x 8/9 x 15/16 x ... x 80/81 x 99/100
3/4 x 8/9 x 15/16 x ... x 99/100 = ?
3/4 x 8/9 x 15/16 x .....x 99/100
Tính nhanh: 4/3 x 9/8 x 16/15 x ... x 121/120
4/3 x 9/8 x 16/15 x 25/24 x...........x 100/99
4/3 x 9/8 x 16/15 x 25/24 x ... x 100/99