Let's solve each part of the "Measuring Centimeters" worksheet step by step. We are asked to measure each object using the ruler shown and round to the nearest centimeter.
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a.
Object: A small oval-shaped object (like a capsule or eraser) placed on the ruler.
- The left end of the object is at
0 cm.
- The right end of the object appears to be just past
3 cm, but not quite at 4 cm.
- Looking closely, it ends
between 3 and 4 cm, closer to
3 cm than 4 cm.
✔ Measurement: 3 cm (rounded to the nearest centimeter)
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b.
Object: A pencil
- The left end of the pencil is at
0 cm.
- The tip of the pencil extends to just past
15 cm, but not quite reaching 16 cm.
- It looks like it’s about
15.5 cm, which rounds to
16 cm when rounding to the nearest centimeter.
✔ Measurement: 16 cm
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c.
Object: A long arrow or pointer
- The left end is at
0 cm.
- The tip reaches just past
8 cm, but less than 9 cm.
- It appears to be around
8.2 cm, so it's closer to
8 cm than 9 cm.
✔ Measurement: 8 cm
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d.
Object: A syringe or needle-like object
- The left end is at
0 cm.
- The tip goes slightly past
5 cm, but not to 6 cm.
- It looks like about
5.3 cm, which is closer to
5 cm than 6 cm.
✔ Measurement: 5 cm
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✔ Final Answers:
a.
3 cm
b.
16 cm
c.
8 cm
d.
5 cm
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🔍 Explanation:
We always measure from the
0 cm mark on the ruler to the
end of the object. Then we estimate the position and
round to the nearest whole number (centimeter). If the measurement is halfway or more, we round up; otherwise, we round down.
For example:
- 3.4 cm → 3 cm
- 3.6 cm → 4 cm
- 15.5 cm → 16 cm
This method ensures accurate estimation to the nearest centimeter as required.
Let me know if you'd like this formatted for printing or need help with similar problems!
Parent Tip: Review the logic above to help your child master the concept of measuring with ruler worksheet.
