50以内计算题 100道 用时： 错误： 23 17 = 25 3 = 3 11 = 15 6 = 20 4 = 16 4 = 27 23 = 41 2 = 12 5 = 4 44 = 8 6 = 3 6 = 11 6 = 28 9 = 9 25 = 8 11 = 28 20 = 19 16 = 5 31 = 33 8 = 30 1 = 2 25 = 14 23 = 23 11 = 2 19 = 32 3 = 19 11 = 6 30 = 3 18 = 10 35 = 11 13 = 13 36 = 3 1 = 29 14 = 5 32 = 13 37 = 15 28 = 4 0 = 0 6 = 6 25 = 18 29 = 10 19 = 28 15 = 24 4 = 5 42 = 4 5 = 1 26 = 0 1 = 23 27 = 0 49 = 11 18 = 46 0 = 22 23 = 20 5 = 42 0 = 9 37 = 45 1 = 13 4 = 20 10 = 10 24 = 17 3 = 23 22 = 27 16 = 25 8 = 8 38 = 21 2 = 36 14 = 0 39 = 14 35 = 0 33 = 27 0 = 1 16 = 4 28 = 40 4 = 30 12 = 2 47 = 20 27 = 3 35 = 4 33 = 1 15 = 3 40 = 19 0 = 21 20 = 4 27 = 16 28 = 34 6 = 18 2 = 34 13 = 26 13 = 31 1 = 26 8 = 36 4 = 7 2 = 12 28 = 35 5 = 31 17 = 18 13 = 17 25 = 13 21 = 12 32 =