Let's solve each part of the worksheet step by step. The task is to
measure each object using the ruler shown and
round to the nearest centimeter.
---
a. Pen
- The pen starts at
0 cm and ends just past
13 cm, but before 14 cm.
- Looking closely: it ends around
13.5 cm.
- Round to the nearest centimeter:
- Since 13.5 is exactly halfway, we round up.
- So,
14 cm.
✔ Answer: 14 cm
---
b. Pushpin (Tack)
- The pushpin starts at
0 cm and ends between
2 cm and
3 cm.
- It appears to end at about
2.2 cm.
- Round to the nearest centimeter:
- 2.2 is closer to
2 than to 3.
✔ Answer: 2 cm
---
c. Crayon
- The crayon starts at
0 cm and ends just past
6 cm, maybe around
6.3 cm.
- Round to the nearest centimeter:
- 6.3 is closer to
6 than to 7.
✔ Answer: 6 cm
---
d. Glue Stick
- The glue stick starts at
0 cm and ends between
5 cm and
6 cm.
- It looks like it ends around
5.8 cm.
- Round to the nearest centimeter:
- 5.8 is closer to
6 than to 5.
✔ Answer: 6 cm
---
✔ Final Answers:
- a.
14 cm
- b.
2 cm
- c.
6 cm
- d.
6 cm
---
🔍 Explanation:
When measuring with a ruler:
1. Align the object with the
0 mark.
2. Read where the object ends.
3. If it’s between two whole numbers, determine which one it’s
closer to.
- If it’s
less than 0.5 cm above the lower number → round down.
- If it’s
0.5 cm or more → round up.
This method ensures accurate rounding to the nearest centimeter.
Let me know if you'd like this as a printable answer key!
Parent Tip: Review the logic above to help your child master the concept of centimeters worksheet.
