You need garden edging for a garden with a perimeter of 14m. Garden edging comes in 1800mm lengths. How many lengths will you need to buy to have enough edging for the entire perimeter?

To find out how many lengths of garden edging you need, follow these steps:

1. **Convert the garden edging length to meters:**
   - The length of one piece of garden edging is 1800 mm.
   - Since 1000 mm = 1 meter, we convert 1800 mm to meters:
   \[
   1800 \, \text{mm} = \frac{1800}{1000} \, \text{m} = 1.8 \, \text{m}
   \]

2. **Divide the total perimeter by the length of one piece of edging:**
   - The perimeter of the garden is 14 meters.
   - Divide 14 meters by 1.8 meters:
   \[
   \frac{14}{1.8} \approx 7.78
   \]

3. **Round up to the nearest whole number:**
   - Since you can't buy a fraction of a length, round 7.78 up to the next whole number:
   \[
   \text{You will need } 8 \text{ lengths of garden edging.}
   \]

So, you need to buy **8 lengths** of garden edging to cover the entire perimeter.

Would you like further details or have any questions?

Here are 5 related questions:
1. How would the number of edging lengths change if the perimeter were larger?
2. What if the edging came in 2-meter lengths?
3. How would you calculate for a perimeter of 20 meters instead?
4. Can you explain how to convert between millimeters and meters?
5. What would happen if one length of edging were shorter than the standard?

**Tip:** When calculating how many items you need, always round up, since fractional parts can't be bought.

Learn how to calculate the number of garden edging lengths needed for a garden with a 14-meter perimeter. This solution involves converting lengths from millimeters to meters, dividing to find the total number of pieces required, and rounding up to the nearest whole number. Suitable for students in Grades 5-7.

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