2 10.500000 + 1.250000 = 11.750000
3 10.500000 - 1.250000 = 9.250000
4 10.500000 * 1.250000 = 13.125000
5 10.500000 / 1.250000 = 8.400000
7 10.500000 + 1.250000 = 11.750000
8 10.500000 - 1.250000 = 9.250000
9 10.500000 * 1.250000 = 13.125000
10 10.500000 / 1.250000 = 8.400000