The math problem in the second grade of primary school divides the clock face into two parts, so that the sum of some numbers in one part is twice that in the other part.
According to the fact that the sum of one part is twice that of the other, and because1+2+3+4+5+6+7+8+9+1+12 = 78, the sum of one part is 78 ÷. Scheme 1: 5+6+7+8=26, which can be divided into ﹙5, 6, 7, 8 and ﹙ 1, 2, 3, 4, 9, 10,1. Scheme 2:1+2+1+12 = 26, which can be divided into ﹙ 1, 2,1/kloc-0.