内容正文:
单元 7 第 1 课时 轴对称(教材 P82)
4 年级 下 R
2. 3 + 4. 6 = 4 - 0. 5 = 5. 6 - 2. 4 = 5. 3 - 1. 1 =
20 - 16. 5 = 2. 5 + 0. 6 = 0. 23 + 0. 56 = 4. 2 + 0. 4 =
3. 8 - 1. 2 = 3. 4 - 2. 4 = 3. 05 + 1. 7 = 3. 8 - 2. 6 =
4. 2 - 3. 1 = 5 + 7. 3 = 5. 9 - 3. 5 = 3. 9 - 2. 9 =
6. 8 - 2. 5 = 4. 2 + 1. 3 = 5. 6 - 2. 4 = 3 + 0. 3 =
3 - 2. 7 = 6. 9 - 4. 6 = 2. 8 + 9. 2 = 2. 5 + 2. 5 =
6. 2 - 0. 2 = 1. 5 - 0. 8 = 8. 1 - 6. 9 = 4. 5 - 2. 3 =
6. 9 + 0. 7 = 3. 6 + 2. 6 = 5. 9 - 2. 5 = 2. 95 + 0. 08 =
9. 36 + 0. 84 = 12. 6 - 4. 78 = 3. 69 + 5. 8 =
3. 45 + 18. 56 - 12. 8 42. 7 - 5. 38 + 16. 9 8. 05 + (11. 25 - 9. 8)
85
单元 7 第 2 课时 平移(教材 P86)
4 年级 下 R
840 ÷ 7 = 960 ÷ 6 = 15 × 40 = 7. 2 + 5. 6 =
4. 8 - 2. 3 = 5 - 2. 7 = 8. 1 + 4. 9 = 560 ÷ 4 =
64 ÷ 4 = 8. 3 + 1. 07 = 4. 5 - 3. 28 = 5. 6 + 2. 9 =
8. 8 - 3. 17 = 25 × 4 = 51 ÷ 3 = 145 + 55 =
237 - 137 = 1200 ÷ 60 = 8. 5 - 7. 4 = 6. 8 - 5. 9 =
9. 4 ÷ 100 = 4. 13 × 10 = 0. 08 × 1000 = 140 ÷ 70 =
9. 5 - 2. 8 = 6. 9 × 100 = 40 ÷ 100 = 8. 7 - 4. 9 =
3. 2 + 4. 7 = 7. 5 ÷ 100 = 15. 3 - 8. 6 = 9. 3 - 2. 5 =
15. 8 + 27. 6 = 83. 5 - 42. 78 = 63. 17 + 5. 98 =
27. 3 + 73. 2 + 72. 7 43. 25 - 10. 4 - 3. 25 76. 8 - 27. 4 - 12. 6
95
单元 7 第 3 课时 练习课(教材 P88)
4 年级 下 R
25 + 75 = 2. 5 + 7. 5 = 0. 25 + 0. 75 = 200 ÷ 4 =
56 + 144 = 125 × 8 = 1. 1 + 5. 2 = 8. 8 - 7. 8 =
640 ÷ 8 = 0. 36 + 0. 64 = 0. 5 + 0. 9 = 2. 4 - 1. 9 =
0. 23 + 1. 6 = 2. 8 - 1. 9 = 3. 5 + 2. 7 = 3. 9 + 2. 46 =
4. 1 - 2. 5 = 2. 5 + 1. 8 = 5 - 1. 45 = 810 ÷ 9 =
15 × 40 = 4. 08 × 100 = 52. 7 ÷ 10 = 7. 6 + 1. 1 =
6. 8 - 4. 7 = 6. 6 + 0. 7 = 7. 3 × 100 = 3. 36 - 0. 06 =
1. 28 + 4. 6 = 8. 5 - 2. 7 = 9. 03 × 100 = 7. 42 - 0. 6 =
4. 5 ÷ 10 = 5. 4 + 3. 6 = 7. 5 - 2. 8 = 8. 07 - 2. 9 =
3. 25 + 1. 68 + 0. 75 6. 35 - (1. 8 + 3. 35) 24. 75 - 7. 47 - 4. 53
10 - 2. 4 - 7. 6 13. 48 - (6. 48 +