50以内整数加减法

2026-05-30

以下是的例子: 1. 27 + 12 = 39 2. 35 - 17 = 18 3. 10 + 20 = 30 4. 46 - 8 = 38 5. 16 + 19 = 35 6. 25 - 11 = 14 7. 5 + 45 = 50 8. 38 - 14 = 24 9. 4 + 15 = 19 10. 30 - 23 = 7 10+15 25-5 40+5 10+35 30-3...

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