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