Math worksheet with two-digit addition and subtraction problems.

Let's solve each of the addition and subtraction problems step by step. Here is the worksheet with all the problems:

---

Row 1:

1. $ 16 + 61 = 77 $
2. $ 60 + 31 = 91 $
3. $ 54 - 23 = 31 $
4. $ 85 - 55 = 30 $
5. $ 72 + 15 = 87 $
6. $ 41 + 16 = 57 $

---

Row 2:

7. $ 78 - 34 = 44 $
8. $ 61 + 14 = 75 $
9. $ 75 - 51 = 24 $
10. $ 43 + 11 = 54 $
11. $ 88 - 12 = 76 $
12. $ 45 + 53 = 98 $

---

Row 3:

13. $ 95 - 71 = 24 $
14. $ 98 - 78 = 20 $
15. $ 46 + 11 = 57 $
16. $ 94 - 12 = 82 $
17. $ 69 - 21 = 48 $
18. $ 52 + 32 = 84 $

---

Row 4:

19. $ 76 + 21 = 97 $
20. $ 97 - 63 = 34 $
21. $ 44 + 15 = 59 $
22. $ 26 + 62 = 88 $
23. $ 84 - 12 = 72 $
24. $ 77 - 35 = 42 $

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✔ Final Answers (in order):

```
77, 91, 31, 30, 87, 57,
44, 75, 24, 54, 76, 98,
24, 20, 57, 82, 48, 84,
97, 34, 59, 88, 72, 42
```

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🔍 Explanation:

Each problem involves either adding or subtracting two-digit numbers. For example:

- $ 16 + 61 $: Add ones place: $ 6+1=7 $, tens: $ 1+6=7 $ → 77
- $ 85 - 55 $: $ 85 - 55 = 30 $ (since 80 - 50 = 30 and 5 - 5 = 0)
- $ 98 - 78 $: Think of it as $ 98 - 70 = 28 $, then $ 28 - 8 = 20 $

For subtraction with borrowing (like $ 78 - 34 $), we subtract digit by digit:
- $ 8 - 4 = 4 $
- $ 7 - 3 = 4 $ → 44

All problems are straightforward arithmetic using basic addition and subtraction rules.

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✔ Answer Key:
```
77 91 31 30 87 57
44 75 24 54 76 98
24 20 57 82 48 84
97 34 59 88 72 42
```

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