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Measuring Length with Decimals

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Measuring Length with Decimals worksheet preview

Measuring Length with Decimals

Ruler and measuring tools illustration

📏 Part 1: Reading Measurements

1. A pencil measures 14 centimetres and 7 millimetres. Write this as a decimal:

_________ cm

2. Convert these measurements to decimal form:

a) 8 cm 3 mm = _______ cm

b) 15 cm 9 mm = _______ cm

c) 6 cm 5 mm = _______ cm

3. Which measurement is longer?

12.4 cm

12.7 cm

4. Round these measurements to the nearest centimetre:

a) 9.3 cm = _______ cm

b) 15.8 cm = _______ cm

c) 7.5 cm = _______ cm

📐 Part 2: Estimation and Measuring

5. Estimate the length of these classroom objects, then measure them with a ruler:

Your desk:

Estimate: _______ cm Actual: _______ cm


Your pencil case:

Estimate: _______ cm Actual: _______ cm


This worksheet (width):

Estimate: _______ cm Actual: _______ cm

6. Convert these millimetre measurements to centimetres (as decimals):

a) 85 mm = _______ cm

b) 127 mm = _______ cm

c) 203 mm = _______ cm

7. A ribbon is 23.6 cm long. How many millimetres is this?

_______ mm

🎯 Part 3: Problem Solving

8. Sarah measures three sticks. Stick A is 8.7 cm, Stick B is 9.2 cm, and Stick C is 8.9 cm. Put them in order from shortest to longest:

Shortest: Stick ___ Middle: Stick ___ Longest: Stick ___

9. A book is 18.4 cm long. If you round this measurement to the nearest centimetre, what would you get? Explain your thinking:
10. Tom says that 7 cm 8 mm is the same as 7.8 cm. Is he correct? Explain why or why not:

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