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1、 20以内混合进阶题 100道 用时: 错误: 0 2 4 = 9 2 4 = 2 6 3 = 0 2 1 = 2 5 3 = 6 2 3 = 7 9 0 = 4 0 1 = 9 4 0 = 4 4 3 = 0 0 3 = 3 3 0 = 3 0 5 = 7 1 1 = 3 1 4 = 1 4 4 = 1 7 0 = 8 6 0 = 5 7 1 = 1 8 0 = 3 1 0 = 0 6 3 = 5 2 4 = 1 4 3 = 8 0 2 = 8 7 4 = 4 7 3 = 2 1 1 = 7 3 2 = 2 3 5 = 8 8 1 = 2 7 1 = 6 2 5 = 1 2 3 = 4 1
2、3 = 6 3 0 = 9 6 2 = 5 4 0 = 7 0 1 = 5 0 3 = 8 1 3 = 6 9 4 = 2 7 5 = 3 0 0 = 8 1 5 = 0 0 0 = 4 1 4 = 5 1 2 = 0 1 4 = 8 0 5 = 3 3 1 = 3 4 1 = 2 5 5 = 6 2 4 = 0 4 2 = 6 1 5 = 1 1 2 = 0 4 5 = 4 3 0 = 1 4 5 = 3 5 1 = 8 9 1 = 5 8 1 = 9 3 5 = 1 9 1 = 7 7 4 = 0 8 4 = 3 5 2 = 4 0 2 = 4 4 0 = 1 5 4 = 5 0 2 = 1 8 1 = 7 0 0 = 2 8 5 = 9 4 1 = 3 8 4 = 2 7 2 = 7 2 1 = 2 0 1 = 5 6 5 = 9 8 3 = 0 2 5 = 2 5 0 = 9 3 1 = 3 4 2 = 2 4 1 = 9 0 4 = 3 4 1 = 0 9 1 = 0 4 0 = 1 7 5 = 5 4 4 = 1 3 3 = 2 8 0 = 4 6 3 = 9 3 0 = 5 2 3 = 1 6 5 = 1 3 4 =