20以内加减混合计算题 100道 用时： 错误： 11 1 7 = 6 4 18 = 17 12 0 = 13 1 3 = 0 4 6 = 11 0 0 = 6 13 15 = 15 2 16 = 15 14 4 = 2 5 6 = 3 11 5 = 4 6 2 = 7 9 0 = 15 13 7 = 9 9 0 = 0 2 4 = 0 0 1 = 19 7 10 = 18 18 8 = 4 7 3 = 2 15 2 = 14 8 5 = 14 2 6 = 2 3 12 = 0 15 2 = 11 1 4 = 10 9 16 = 16 2 13 = 18 2 8 = 16 16 9 = 11 3 3 = 18 0 11 = 17 10 0 = 3 3 15 = 16 13 3 = 16 8 1 = 13 3 3 = 14 6 5 = 2 4 13 = 11 6 10 = 0 4 7 = 14 3 2 = 10 1 4 = 0 19 1 = 8 0 7 = 3 4 3 = 8 12 3 = 9 1 10 = 16 12 4 = 11 0 0 = 9 6 10 = 12 8 9 = 3 2 0 = 4 6 3 = 16 14 3 = 19 10 0 = 8 1 11 = 9 7 17 = 5 2 1 = 3 0 0 = 15 10 4 = 1 17 1 = 10 3 7 = 3 7 6 = 8 5 12 = 17 8 0 = 11 3 7 = 16 12 4 = 9 6 13 = 18 17 14 = 6 10 11 = 12 6 9 = 8 3 11 = 17 10 0 = 17 15 6 = 6 2 4 = 18 13 3 = 2 9 9 = 19 5 7 = 14 5 2 = 19 5 14 = 11 8 13 = 0 18 5 = 11 11 6 = 6 9 1 = 13 1 3 = 1 2 3 = 6 6 6 = 13 11 13 = 18 4 11 = 17 11 0 = 0 18 1 = 2 6 5 = 14 3 3 = 1 19 0 = 0 4 2 = 8 0 8 = 9 0 7 = 8 2 8 = 18 1 8 =