破十法 综合练习题. 姓名退位减法（破十法口诀：看大数，分出10，减小数，加剩数。）15 6 = 12 5 = 17 9 = 13 9 = 13 4 = 11 5 = 14 7 = 17 8 = 16 8 = 15 9 = 18 9 = 14 6 = 12 7 = 14 9 = 13 7 = 15 7 = 12 9 = 11 3 = 12 4 = 15 8 = 16 9 = 15 8 = 13 8 = 12 6 = 11 6 = 13 4 = 14 5 = 13 8 =