20道加减混合运算四年级下册的有答案？
回答如下：1. 45 + 27 – 13 = 59
2. 68 – 23 + 15 = 60
3. 96 – 12 – 23 = 61
4. 85 + 27 – 49 = 63
5. 64 – 27 + 18 = 55
6. 92 – 35 + 14 = 71
7. 78 + 24 – 39 = 63
8. 56 – 15 + 27 = 68
9. 74 – 29 – 17 = 28
10. 83 + 18 – 39 = 62
11. 47 – 18 + 24 = 53
12. 69 + 15 – 27 = 57
13. 52 – 19 + 27 = 60
14. 63 + 21 – 38 = 46
15. 87 – 36 + 14 = 65
16. 76 – 29 – 17 = 30
17. 91 + 15 – 38 = 68
18. 58 – 17 + 23 = 64
19. 72 + 27 – 45 = 54
20. 85 – 18 + 37 = 104
简便计算题大全四年级9十99十999＝
- =100+1000+7=1107
