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

四年级400一180÷3综合算式为()

• 400一180÷3=400-60=340