Problem:
We are given several bottles, each containing a certain amount of liquid in milliliters (ml). The goal is to
determine how much more liquid needs to be added to each bottle to make exactly 1 litre (1000 ml).
---
Key Concept:
- 1 litre = 1000 millilitres
- To find how much to add:
$$
\text{Amount to add} = 1000\,\text{ml} - \text{Current amount in the bottle}
$$
---
Let’s go through each bottle one by one:
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####
1. Bottle with 300 ml
$$
1000 - 300 = 700\,\text{ml}
$$
✔ Already filled in:
700 ml
---
####
2. Bottle with 270 ml
$$
1000 - 270 = 730\,\text{ml}
$$
👉
Answer: 730 ml
---
####
3. Bottle with 450 ml
$$
1000 - 450 = 550\,\text{ml}
$$
👉
Answer: 550 ml
---
####
4. Bottle with 800 ml
$$
1000 - 800 = 200\,\text{ml}
$$
👉
Answer: 200 ml
---
####
5. Bottle with 500 ml
$$
1000 - 500 = 500\,\text{ml}
$$
👉
Answer: 500 ml
---
####
6. Bottle with 550 ml
$$
1000 - 550 = 450\,\text{ml}
$$
👉
Answer: 450 ml
---
####
7. Bottle with 650 ml
$$
1000 - 650 = 350\,\text{ml}
$$
👉
Answer: 350 ml
---
####
8. Bottle with 350 ml
$$
1000 - 350 = 650\,\text{ml}
$$
👉
Answer: 650 ml
---
####
9. Bottle with 900 ml
$$
1000 - 900 = 100\,\text{ml}
$$
👉
Answer: 100 ml
---
####
10. Bottle with 600 ml
$$
1000 - 600 = 400\,\text{ml}
$$
👉
Answer: 400 ml
---
####
11. Bottle with 700 ml
$$
1000 - 700 = 300\,\text{ml}
$$
👉
Answer: 300 ml
---
####
12. Bottle with 630 ml
$$
1000 - 630 = 370\,\text{ml}
$$
👉
Answer: 370 ml
---
✔ Final Answers (in order):
| Bottle | Current (ml) | Add to Make 1 Litre |
|--------|--------------|---------------------|
| 1 | 300 |
700 ml |
| 2 | 270 |
730 ml |
| 3 | 450 |
550 ml |
| 4 | 800 |
200 ml |
| 5 | 500 |
500 ml |
| 6 | 550 |
450 ml |
| 7 | 650 |
350 ml |
| 8 | 350 |
650 ml |
| 9 | 900 |
100 ml |
| 10 | 600 |
400 ml |
| 11 | 700 |
300 ml |
| 12 | 630 |
370 ml |
---
📌 Summary:
To solve this problem:
- Remember that
1 litre = 1000 ml.
- Subtract the current amount from 1000 ml to get how much more is needed.
This helps build understanding of
capacity,
subtraction, and
unit conversion — all important for Grade 4 maths!
Parent Tip: Review the logic above to help your child master the concept of measurement capacity worksheet.
