一、直接写出得数
2 + 3 = 7 + 2 = 3 + 4 = 10 + 6 =
4 + 6 = 5 + 5 = 5–2 = 8–4 =
7–5 = 10–3 = 8 + 5 = 9–6 =
9 + 4 = 4 + 7 = 7 + 8 = 11 – 10 =
5 + 7 = 6 + 6 = 7 + 9 = 6 + 7 =
8 + 6 = 9 + 9 = 8 + 9 = 15–5 =
1 + 3 + 2 = 3 + 3 – 4 = 8–2–2 =
4 + 5 + 1 = 10–9 + 6 =
