Math worksheet featuring five word problems that require students to solve 4-digit addition and subtraction equations.

Let’s solve each problem step by step.

---

Problem 1:
Tyger scores 9175 points. Frazer scores 3627 points.
We need to find how many *more* points Tyger scored → that means subtraction:
9175 - 3627

Let’s subtract:

```
9175
- 3627
------
```

Start from the right:

- 5 - 7 → can’t do, borrow from 7 (tens place). 7 becomes 6, 5 becomes 15 → 15 - 7 = 8
- 6 (after borrowing) - 2 = 4
- 1 - 6 → can’t do, borrow from 9. 9 becomes 8, 1 becomes 11 → 11 - 6 = 5
- 8 - 3 = 5

So: 9175 - 3627 = 5548

✔ Tyger scored 5548 more points.

---

Problem 2:
Male elephant: 7236 lb
Female elephant: 4285 lb
Combined weight → addition:
7236 + 4285

Add:

```
7236
+ 4285
------
```

Right to left:

- 6 + 5 = 11 → write 1, carry 1
- 3 + 8 = 11 + 1 (carry) = 12 → write 2, carry 1
- 2 + 2 = 4 + 1 = 5
- 7 + 4 = 11

So: 7236 + 4285 = 11521

✔ Their combined weight is 11521 lb.

---

Problem 3:
Tractor made in 1978. How old in 2020?
→ Subtract: 2020 - 1978

```
2020
- 1978
------
```

- 0 - 8 → borrow. 20 becomes 19, last digit 0 becomes 10 → 10 - 8 = 2
- 9 (after borrow) - 7 = 2
- 0 - 9 → can’t do. Borrow from 2. 2 becomes 1, 0 becomes 10 → but we already borrowed for tens? Let’s do it carefully:

Actually, better way:

2020 - 1978 = ?

Think: 1978 to 2000 is 22 years.
2000 to 2020 is 20 years.
Total: 22 + 20 = 42

Or direct subtraction:

```
2020
- 1978
------
42
```

✔ The tractor was 42 years old in 2020.

---

Problem 4:
Total animals: 3143
Mammals: 726
Not mammals → subtract: 3143 - 726

```
3143
- 726
------
```

- 3 - 6 → borrow. 4 becomes 3, 3 becomes 13 → 13 - 6 = 7
- 3 (after borrow) - 2 = 1
- 1 - 7 → can’t do. Borrow from 3. 3 becomes 2, 1 becomes 11 → 11 - 7 = 4
- 2 - 0 = 2

Wait — let’s align properly:

Actually:

```
3143
- 726
------
```

Write as:

```
3143
- 0726 (add leading zero for alignment)
------
```

Now:

- Units: 3 - 6 → borrow → 13 - 6 = 7; tens digit 4 becomes 3
- Tens: 3 - 2 = 1
- Hundreds: 1 - 7 → can’t → borrow from thousands. 3 becomes 2, 1 becomes 11 → 11 - 7 = 4
- Thousands: 2 - 0 = 2

So: 2417

Check: 726 + 2417 = 3143?
726 + 2400 = 3126; 3126 + 17 = 3143 ✔

✔ There are 2417 animals which are not mammals.

---

Problem 5:
Stone tiles: 7578
Glass tiles: 1856
Total tiles → add: 7578 + 1856

```
7578
+ 1856
------
```

- 8 + 6 = 14 → write 4, carry 1
- 7 + 5 = 12 + 1 = 13 → write 3, carry 1
- 5 + 8 = 13 + 1 = 14 → write 4, carry 1
- 7 + 1 = 8 + 1 = 9

So: 7578 + 1856 = 9434

Check: 7578 + 1800 = 9378; 9378 + 56 = 9434 ✔

✔ There are 9434 mosaic tiles in total.

---

Final Answer:
1) 5548
2) 11521
3) 42
4) 2417
5) 9434