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Metric Conversions and Decimals

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Metric Conversions and Decimals

Metric Conversions and Decimals

Metric measurement tools including ruler, scales and measuring jug

📏 Part 1: Length Conversions

1. Convert these measurements. Show your working:

a) 2.5 metres = ________ centimetres

b) 1350 millimetres = ________ centimetres

c) 0.75 metres = ________ millimetres

d) 45 centimetres = ________ metres (as a decimal)

2. Circle the correct answer:

Which measurement is the longest?

1.2 metres

1250 millimetres

115 centimetres

0.9 metres

⚖️ Part 2: Mass (Weight) Conversions

3. Convert these measurements:

a) 3.2 kilograms = ________ grams

b) 750 grams = ________ kilograms (as a decimal)

c) 0.5 kilograms = ________ grams

d) 2450 grams = ________ kilograms (as a decimal)

4. Tick all the measurements that are equal to 1.5 kilograms:

1500 grams

150 grams

1.50 kg

15000 grams

🥤 Part 3: Capacity Conversions

5. Convert these measurements:

a) 2.8 litres = ________ millilitres

b) 650 millilitres = ________ litres (as a decimal)

c) 0.25 litres = ________ millilitres

d) 1750 millilitres = ________ litres (as a decimal)

6. Circle the measurement that equals half a litre:

50 mL

500 mL

5000 mL

0.05 L

🔗 Part 4: Understanding Metric Prefixes

7. Match each prefix with its meaning:
1. milli-
2. centi-
3. kilo-
A. one thousand (×1000)
B. one hundredth (÷100)
C. one thousandth (÷1000)
8. Fill in the missing numbers:

a) 1 metre = ________ centimetres = ________ millimetres

b) 1 kilogram = ________ grams

c) 1 litre = ________ millilitres

🧮 Part 5: Problem Solving with Decimals

9. Solve these real-world problems. Show your working:

a) Sarah has a water bottle that holds 0.75 litres. How many millilitres is this?

b) A recipe needs 1.2 kg of flour. Tom has 850 grams. How many more grams does he need?

c) A piece of ribbon is 2.35 metres long. Express this length in centimetres.

10. Estimation challenge:

Circle the most reasonable estimate for each measurement:

Height of a classroom door:

2.1 metres

21 centimetres

0.21 metres

Mass of a textbook:

5 kilograms

0.5 kilograms

50 kilograms

💭 Part 6: Reflection

11. Explain in your own words how decimals help us with metric measurements:
12. Draw a diagram to show the relationship between metres, centimetres, and millimetres:

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