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1. 3 + 4 × 2 - 5 ÷ 5 = ? 2. 12 ÷ (3 - 2) × 2 + 1 = ? 3. 7 × (6 + 2) ÷ 3 - 4 = ? 4. 5 × 4 - 3 × 2 + 1 ÷ 1 = ? 5. 9 + 6 × 3 - 2 ÷ 2 = ? 6. 8 ÷ (4 + 1) × 2 - 5 = ? 7. 12 ÷ 3 + 4 × 5 - 2 = ? 8.