[1 또 1/3 빼기(0.2+1/3) *4.5] +13 또 1/2 간산 12 또 3/4-2 또 2 / 5 * 3 또 3 / 4 / 2 또 1 / 2 6.3/ (2.6+5 또 1/3*1 또 8/7)

[1 또 1/3 빼기(0.2+1/3) *4.5] +13 또 1/2 간산 12 또 3/4-2 또 2 / 5 * 3 또 3 / 4 / 2 또 1 / 2 6.3/ (2.6+5 또 1/3*1 또 8/7)

[1 또 1/3 빼기(0.2+1/3) *4.5] +13 또 1/2 = [1 또 1/3 빼기 8/15 * 4.5] + 13 또 1/2 = 4/3 - 2.4 + 13.5 = 4/3 + 11.1 = 12 또 13 / 3012 또 3 / 4-2 또 2 / 5 * 3 또 3 / 4 / 2 또 1/2 = 12 또 3 / 4 / 5 * 15 / 4 / 2.5 = 12 또 3 / 4 / 2.5 = 12.75 - 3.6 = 9.156.3 / (2.6+5 또 1/3*1과 7/8)=6.3/.