https://r2.erweima.ai/mathbot/image/1726395494013v3u0k58j.jpg

Let's solve the problem step by step:

### Problem Breakdown:
1. We need to estimate the total cost of:
   - 2 blue pencils
   - 3 pink erasers
   - 1 green ruler, 1 pink ruler, and 1 blue ruler
2. The prices in the table should be rounded to 1 significant figure before calculating.

### Step 1: Rounding to 1 Significant Figure
- **Blue pencil**: £0.35 rounds to **£0.4**
- **Pink eraser**: £1.10 rounds to **£1**
- **Green ruler**: £3.78 rounds to **£4**
- **Pink ruler**: £2.85 rounds to **£3**
- **Blue ruler**: £3.29 rounds to **£3**

### Step 2: Calculate the Total Cost
- 2 blue pencils = \( 2 \times 0.4 = 0.8 \) pounds
- 3 pink erasers = \( 3 \times 1 = 3 \) pounds
- 1 green ruler = \( 4 \) pounds
- 1 pink ruler = \( 3 \) pounds
- 1 blue ruler = \( 3 \) pounds

### Step 3: Total
\[
0.8 + 3 + 4 + 3 + 3 = 13.8
\]

So, the estimated total cost is **£13.80**.

Would you like more details, or do you have any questions?

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Here are 5 related questions for further practice:
1. What would be the total cost if all rulers were blue?
2. How much would it cost if only 5 pink erasers were purchased?
3. What is the difference in cost between buying 2 green rulers and 2 blue rulers?
4. How would the total cost change if the prices were rounded to 2 significant figures?
5. If the price of a blue ruler increased by 10%, how would that affect the total?

### Tip:
When rounding numbers, remember to focus on the first non-zero digit and adjust the following digits accordingly.

By rounding their costs to 1 significant figure, estimate the total cost of 2 blue pencils, 3 pink erasers, and 1 of each color of ruler. Give your answer in pounds (£).

Learn how to estimate the total cost of multiple items by rounding their prices to 1 significant figure. This example calculates the cost of pencils, erasers, and rulers using rounding, suitable for students in Grades 6-8.

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