Printable primary math worksheet for math grades 1 to 6 based on ... - Free Printable

Let's solve each problem step by step. We are looking for missing integers in equations involving addition and subtraction, where the numbers range from -50 to 50.

We'll go row by row and solve for the missing number (represented by the blank box).

---

Row 1

1. $ 40 - \boxed{} = 50 $
→ $ \boxed{} = 40 - 50 = -10 $

2. $ \boxed{} + (-22) = 0 $
→ $ \boxed{} = 0 + 22 = 22 $

3. $ -38 - \boxed{} = -40 $
→ $ \boxed{} = -38 - (-40) = -38 + 40 = 2 $

---

Row 2

4. $ \boxed{} + 5 = -26 $
→ $ \boxed{} = -26 - 5 = -31 $

5. $ -33 - \boxed{} = -29 $
→ $ \boxed{} = -33 - (-29) = -33 + 29 = -4 $

6. $ \boxed{} + (-5) = -35 $
→ $ \boxed{} = -35 + 5 = -30 $

---

Row 3

7. $ 20 - \boxed{} = 46 $
→ $ \boxed{} = 20 - 46 = -26 $

8. $ \boxed{} + (-3) = -43 $
→ $ \boxed{} = -43 + 3 = -40 $

9. $ 18 - \boxed{} = 35 $
→ $ \boxed{} = 18 - 35 = -17 $

---

Row 4

10. $ \boxed{} + 12 = -17 $
→ $ \boxed{} = -17 - 12 = -29 $

11. $ 20 - \boxed{} = 37 $
→ $ \boxed{} = 20 - 37 = -17 $

12. $ \boxed{} - (-1) = -34 $
→ $ \boxed{} + 1 = -34 $ → $ \boxed{} = -35 $

---

Row 5

13. $ -19 + \boxed{} = -45 $
→ $ \boxed{} = -45 + 19 = -26 $

14. $ \boxed{} - 15 = -45 $
→ $ \boxed{} = -45 + 15 = -30 $

15. $ -15 + \boxed{} = -30 $
→ $ \boxed{} = -30 + 15 = -15 $

---

Row 6

16. $ \boxed{} + (-33) = 1 $
→ $ \boxed{} = 1 + 33 = 34 $

17. $ -40 + \boxed{} = -41 $
→ $ \boxed{} = -41 + 40 = -1 $

18. $ \boxed{} - (-8) = 38 $
→ $ \boxed{} + 8 = 38 $ → $ \boxed{} = 30 $

---

Row 7

19. $ -34 - \boxed{} = -47 $
→ $ \boxed{} = -34 - (-47) = -34 + 47 = 13 $

20. $ \boxed{} + 40 = 5 $
→ $ \boxed{} = 5 - 40 = -35 $

21. $ 50 - \boxed{} = 50 $
→ $ \boxed{} = 50 - 50 = 0 $

---

Row 8

22. $ \boxed{} + (-18) = 14 $
→ $ \boxed{} = 14 + 18 = 32 $

23. $ -22 - \boxed{} = 11 $
→ $ \boxed{} = -22 - 11 = -33 $

24. $ \boxed{} + (-47) = -49 $
→ $ \boxed{} = -49 + 47 = -2 $

---

Row 9

25. $ 33 - \boxed{} = 49 $
→ $ \boxed{} = 33 - 49 = -16 $

26. $ \boxed{} + (-22) = 20 $
→ $ \boxed{} = 20 + 22 = 42 $

27. $ 50 + \boxed{} = 49 $
→ $ \boxed{} = 49 - 50 = -1 $

---

Row 10

28. $ \boxed{} - (-28) = -7 $
→ $ \boxed{} + 28 = -7 $ → $ \boxed{} = -35 $

29. $ -41 - \boxed{} = -46 $
→ $ \boxed{} = -41 - (-46) = -41 + 46 = 5 $

30. $ \boxed{} + (-19) = 11 $
→ $ \boxed{} = 11 + 19 = 30 $

---

✔ Final Answers (in order):

```
-10 22 2
-31 -4 -30
-26 -40 -17
-29 -17 -35
-26 -30 -15
34 -1 30
13 -35 0
32 -33 -2
-16 42 -1
-35 5 30
```

You can now fill them into the worksheet accordingly.

---

📝 Summary:

Each equation was solved by isolating the missing variable using basic algebraic rules:
- For $ a - x = b $ → $ x = a - b $
- For $ x + a = b $ → $ x = b - a $
- Remember: subtracting a negative is like adding.

Let me know if you'd like this formatted as a printable answer key!