Question

John by six pencils at the book bar each pencil cost $.20 how can John use the number line to find the total cost of pencils

Answer 1

To use a number line to find the total cost of 6 pencils that each cost $0.20, John can follow these steps:

1. **Understand the Cost per Pencil**: Each pencil costs $0.20.
2. **Calculate the Total Cost**: Multiply the number of pencils by the cost per pencil:
\[
\text{Total cost} = \text{Number of pencils} \times \text{Cost per pencil} = 6 \times 0.20 = 1.20
\]

3. **Using a Number Line**:
- Draw a horizontal line and mark it with increments of $0.20.
- Below the line, you can label the points: $0.20, $0.40, $0.60, $0.80, $1.00, $1.20.
- Start at $0 (the starting point) and make jumps to the right for each pencil, moving $0.20 each time.

4. **Count the Jumps**:
- From $0.00, make the following jumps:
- First jump to $0.20 (1 pencil)
- Second jump to $0.40 (2 pencils)
- Third jump to $0.60 (3 pencils)
- Fourth jump to $0.80 (4 pencils)
- Fifth jump to $1.00 (5 pencils)
- Sixth jump to $1.20 (6 pencils)

5. **Final Result**: After six jumps, John lands on $1.20, which is the total cost of the 6 pencils.

By visualizing this with a number line, John can easily see how he reaches the total cost.