Solve the following arithmetic problems: 1) Addition: 24 + 37 = ?, 58 + 19 = ?, 75 + 46 = ? 2) Subtraction: 83 - 27 = ?, 92 - 45 = ?, 67 - 29 = ? 3) Multiplication: 6 × 8 = ?, 9 × 7 = ?, 12 × 5 = ? 4) Division: 45 ÷ 5 = ?, 56 ÷ 8 = ?, 81 ÷ 9 = ?. Show your work for each problem.