50以内计算题 100道 用时： 错误： 32 17 = 11 9 = 49 16 = 15 10 = 41 5 = 21 0 = 40 17 = 36 18 = 46 36 = 31 19 = 44 22 = 42 3 = 27 19 = 45 5 = 4 3 = 44 28 = 19 3 = 48 22 = 12 8 = 45 15 = 27 24 = 39 30 = 25 1 = 32 12 = 26 21 = 40 12 = 43 24 = 47 40 = 20 8 = 34 26 = 32 24 = 28 13 = 30 26 = 33 0 = 23 15 = 48 28 = 41 0 = 33 6 = 19 9 = 29 5 = 23 14 = 38 38 = 24 2 = 19 19 = 36 23 = 49 10 = 37 10 = 20 2 = 45 4 = 25 0 = 28 12 = 28 8 = 18 16 = 48 11 = 20 13 = 28 7 = 16 14 = 8 2 = 29 0 = 20 7 = 7 3 = 15 15 = 36 7 = 46 3 = 41 11 = 39 24 = 35 19 = 36 17 = 35 31 = 16 7 = 44 23 = 28 2 = 24 7 = 31 30 = 42 42 = 27 14 = 46 43 = 37 5 = 49 15 = 47 46 = 47 24 = 32 7 = 47 35 = 39 25 = 33 5 = 49 48 = 35 29 = 32 1 = 12 2 = 46 41 = 38 36 = 33 11 = 25 6 = 24 19 = 19 14 = 34 32 = 31 25 = 40 29 = 28 18 = 40 22 =