第5单元 简易方程-【优佳好】2023-2024学年五年级上册数学口算计算能力提升（人教版）

单元 5 　 第 1 课时　 用字母表示数(1) 5 年级 上 R 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　a ×8 = 0. 5 × 0. 9 = 5. 3 × 4 = 0. 7 × 0. 3 = 4. 7 × y = 1. 8 ÷ 0. 03 = 2. 4 × 6 = 30 × 0. 09 = 9a ×m = 70 ÷ 0. 14 = 0. 07 ÷ 0. 05 = 3. 2 × 0. 3 = 6 × b = 0. 09 × 70 = 3. 5 × 0. 01 = 2. 02 × 0. 4 = 1. 2 × 3 = 2. 4 × 0. 3 = 3. 66 ÷ 1. 2 = 0. 11 × 5 = a × x = 0. 7 × 5 = 1. 75 × 2 = 7. 5 ÷ 5 = m ×1 = 1. 6 × 0. 3 = 3 ÷ 0. 3 = 0. 07 × 5 = 2. 5 × 2. 5 = 120 × 0. 7 = 10 ÷ 25 = 0. 84 ÷ 0. 7 = 0. 5 × 8. 4 = 23 × 0. 01 = 0. 56 ÷ 0. 28 = 8 ÷ 0. 5 = 5 ÷ 100 = 4. 2 ÷ 0. 1 = 0. 49 ÷ 0. 7 = 3. 1 × 0. 3 = 7. 01 × 5. 3 = 　 　 　 　 　 　 　 　 10. 89 ÷ 72. 6 = 　 　 　 　 　 　 　 　 23. 4 × 0. 26≈ (得数保留两位小数) 16. 12 × 99 + 16. 12 4. 3 × 50 × 0. 2 1. 2 × (9. 6 ÷ 2. 4) ÷ 4. 8 53 单元 5 　 第 2 课时　 练习课 5 年级 上 R 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　0. 35 × 4 = 0. 81 × 3 = 80 × 1. 25 = 7. 2 ÷ 2. 4 = 1. 01 × 6 = 3. 2 × 0. 2 = 9. 2 ÷ 0. 25 = 14 ÷ 0. 5 = 15 × 0. 08 = 36 ÷ 0. 4 = 12. 6 ÷ 6 = x × y = b ×1 = x ×4 = a × a = 7 × a = a ×14 = m ×6 = 5. 7 ×m = 6. 5 × t = m × x = 2 × k = y ×8 = x ×6 = 0. 8 × 10 = 0. 6 × 12 = 3. 8 × 9 = 5. 2 × 5 = 0. 7 × 0. 6 = 2. 8 × 0. 4 = 0. 16 × 0. 5 = 1. 8 × 0. 04 = 6 ÷ 0. 3 = 0. 2 × 0. 3 = 1. 25 ÷ 5 = 0. 8 ÷ 5 = 7. 5 ÷ 2. 5 = 0. 18 ÷ 30 = 2. 3 × 0. 6 = 4. 8 ÷ 16 = 5. 8 × 12 = 　 　 　 　 　 　 　 　 　 3. 28 × 1. 5≈　 　 　 　 　 　 　 　 　 1. 2 × 0. 025 = (得数精确到十分位) 36 ÷ 48 = 6. 17 ÷ 2. 4≈ 14. 03 ÷ 6. 1 = (得数保留两位小数) 63 单元 5 　 第 3 课时　 用字母表示数(2) 5 年级 上 R 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　y ×6 × y = 6. 7x -0. 62x = 2a + a = 8. 4c -4. 2c = a ×8 = 5a +3. 9a = 4. 8n -0. 3n = 3. 3x -1. 12x = m × n = 7. 2t -0. 8t = 6. 8m +5m = 7x -1. 4x = 9x +4x = a -0. 6a = 13x -7. 5x = a ×5 = 3n -2n = 8 - a ×3 = 2. 5x ×6 = 2c -0. 2c = 4a +2a = (a +3) × 6 = 4a +0. 2a = 11b -5b = (a + b) × b = x -0. 5x = 3. 6m -2m = 0. 16a -0. 07a = a +7a = 7. 5x -6. 3x = 8. 2n +1. 8n = 4. 13b +2. 07b = 4. 8 ÷ 16 = 1. 9 × 0. 5 = 9 ÷ 0. 45 = 5. 1 ÷ 17 = 13. 6 × 4 = 0. 93 ÷ 31 = 2. 5