The image shows a pencil placed on top of a ruler to measure its length. Let's analyze the measurement carefully.
Step-by-step Analysis:
1.
Identify the ruler scale:
The ruler is marked in centimeters (cm), with each centimeter divided into 10 millimeters (mm). The numbers go from 0 to 13 cm on the top edge, and there’s a second scale below it (likely for inches or another unit, but we'll focus on the metric scale).
2.
Locate the pencil's position:
- The
tip of the pencil (the sharpened end) aligns with the
2 cm mark.
- The
end of the pencil (with the eraser) extends to just past the
13 cm mark.
3.
Determine exact length:
- The pencil starts at
2 cm.
- It ends at
13.5 cm, as the eraser tip goes slightly beyond the 13 cm mark, about halfway between 13 and 14 cm.
4.
Calculate the length:
$$
\text{Length} = \text{End position} - \text{Start position}
$$
$$
\text{Length} = 13.5\, \text{cm} - 2\, \text{cm} = 11.5\, \text{cm}
$$
Final Answer:
The length of the pencil is
11.5 centimeters.
Explanation:
- The ruler helps us determine the distance between two points: the start and end of the pencil.
- By subtracting the starting point (2 cm) from the ending point (13.5 cm), we get the total length.
- This method ensures accuracy by using the ruler's calibrated markings.
✔ So, the pencil is
11.5 cm long.
Parent Tip: Review the logic above to help your child master the concept of measuring a pencil.
