第4单元 观察物体-【优佳好】2023-2024学年四年级下册数学口算计算能力提升（北师大版）

单元四 　 第 1 课时　 看一看 4 年级 下 B 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　0. 28 × 9 = 6. 1 × 0. 8 = 10. 4 × 2 = 4. 2 × 0. 8 = 2. 4 × 23 = 0. 12 × 5 = 500 × 0. 2 = 3. 8 × 5 = 31. 6 × 8 = 4. 2 × 0. 6 = 12. 5 × 4 = 0. 25 × 6 = 0. 47 × 80 = 30 × 0. 01 = 4. 5 × 0. 5 = 2. 7 × 0. 4 = 4. 6 × 0. 8 = 7. 3 × 0. 6 = 5. 1 × 0. 7 = 2. 3 × 0. 4 = 3. 2 × 2. 6 = 0. 65 × 0. 4 = 0. 05 × 0. 8 = 2. 5 × 3 = 2. 7 × 1. 05 = 0. 9 × 2. 03 = 500 × 0. 01 = 1. 25 × 0. 4 = 0. 25 × 0. 8 = 1. 6 × 2. 5 = 8 × 3. 2 = 5. 3 × 0. 4 = 5. 4 × 0. 3 = 2. 3 × 0. 9 = 2. 4 × 0. 8 = 1. 1 × 0. 09 = 21. 2 ÷ 1000 = 3. 6 × 0. 6 = 4. 4 × 0. 3 = 4. 1 × 0. 9 = 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　2. 07 × 3. 6 = 7. 36 × 5. 3 = 8. 77 × 0. 16 = 3. 78 × 99 + 3. 78 15 × 0. 4 × 25 8. 4 × 101. 3 - 8. 4 × 1. 3 83 单元四 　 第 2 课时　 我说你搭 4 年级 下 B 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　0. 8 × 10 = 1. 2 × 0. 4 = 1. 5 × 0. 9 = 0. 7 × 0. 3 = 0. 6 × 12 = 3. 03 × 0. 2 = 6. 2 × 4 = 12. 5 × 0. 8 = 3. 8 × 9 = 140 × 0. 6 = 8. 2 × 0. 6 = 4. 5 × 0. 4 = 5. 2 × 5 = 2. 4 × 0. 7 = 0. 08 × 0. 3 = 1. 5 × 0. 04 = 0. 7 × 0. 6 = 2. 6 × 0. 5 = 0. 72 × 5 = 7. 5 × 0. 4 = 2. 8 × 0. 4 = 4 × 0. 25 = 0. 8 × 50 = 0. 3 × 3. 2 = 0. 16 × 0. 5 = 3. 7 × 0. 4 = 1. 3 × 0. 5 = 12 × 0. 25 = 1. 8 × 0. 04 = 5. 2 × 0. 3 = 12. 7 × 0. 1 = 4. 13 × 0. 4 = 2 × 7. 8 = 7. 23 - 1. 23 = 8. 5 - 5. 8 = 0. 52 + 0. 4 = 4. 3 × 0. 4 = 11. 5 ÷ 1000 = 4. 52 × 0. 2 = 1. 9 × 2. 6 = 59. 8 × 0. 23 = 　 　 　 　 　 　 　 　 4. 56 × 1. 5 = 　 　 　 　 　 　 　 　 13. 5 × 4. 5 = 0. 25 × 32 × 0. 125 1. 7 × 1. 4 + 8. 3 × 1. 4　 7. 5 × 102 93 单元四 　 第 3 课时　 搭一搭 4 年级 下 B 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　4. 8 × 0. 2 = 0. 25 × 5 = 3. 3 × 4 = 12. 2 × 3 = 5. 1 × 0. 7 = 12. 5 × 8 = 0. 7 × 2. 5 = 1. 01 × 16 = 7. 3 × 0. 6 = 4. 2 × 0. 7 = 2. 8 × 4 = 0. 17 × 0. 4 = 0. 3 × 0. 15 = 3. 9 × 5 = 4. 5 × 0. 7 = 0. 05 × 80 = 9. 2 × 8 = 400 × 0. 2 = 0. 16 × 5 = 9. 5 × 0. 01 = 3. 1 × 4 = 0. 12 × 5 = 34 × 0. 5 = 18 × 0. 2 = 7. 2 × 0. 5 = 4. 2 × 0. 8 = 9. 1 × 4 = 5 × 2. 2 = 2. 7 ×