Metric Mania worksheet with conversion problems and tables for learning metric units.

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Metric Mania – English or Metric?

This worksheet helps students convert between metric units (e.g., millimeters, centimeters, meters, kilometers, grams, kilograms, milliliters, liters) and understand when to use metric vs. English units.

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Part A: Convert the following measurements.

Here are common conversion problems that appear on such worksheets:

1. 150 cm = ___ m
→ Since 1 meter = 100 cm:
$ 150 \div 100 = 1.5 $
✔ Answer: 1.5 m

2. 36 mm = ___ cm
→ 1 cm = 10 mm → $ 36 \div 10 = 3.6 $
✔ Answer: 3.6 cm

3. 4500 mL = ___ L
→ 1 L = 1000 mL → $ 4500 \div 1000 = 4.5 $
✔ Answer: 4.5 L

4. 8.7 kg = ___ g
→ 1 kg = 1000 g → $ 8.7 \times 1000 = 8700 $
✔ Answer: 8700 g

5. 9.2 km = ___ m
→ 1 km = 1000 m → $ 9.2 \times 1000 = 9200 $
✔ Answer: 9200 m

6. 1200 mg = ___ g
→ 1 g = 1000 mg → $ 1200 \div 1000 = 1.2 $
✔ Answer: 1.2 g

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Part B: Choose the best unit for measuring each object.

These questions ask whether to use mm, cm, m, km, g, kg, mL, L, etc.

Example:
- The length of a pencil → cm
- The distance between two cities → km
- The weight of a car → kg
- The amount of water in a swimming pool → L or kL
- The thickness of a coin → mm

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Part C: Word Problems

Let’s say one problem is:

> A bottle contains 2.5 L of juice. How many milliliters is this?

→ $ 2.5 \times 1000 = 2500 $ mL
✔ Answer: 2500 mL

Another:

> A person weighs 75 kg. What is their weight in grams?

→ $ 75 \times 1000 = 75,000 $ g
✔ Answer: 75,000 g

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Key Metric Prefixes (to remember):

| Prefix | Symbol | Meaning | Example |
|--------|--------|---------|---------|
| kilo- | k | 1000 | 1 km = 1000 m |
| hecto- | h | 100 | 1 hm = 100 m |
| deka- | da | 10 | 1 dam = 10 m |
| (base) | | 1 | 1 m, 1 g, 1 L |
| deci- | d | 0.1 | 1 dm = 0.1 m |
| centi- | c | 0.01 | 1 cm = 0.01 m |
| milli- | m | 0.001 | 1 mm = 0.001 m |

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Tips for Converting:

- Use the "ladder method": Move the decimal point based on how many steps you go up or down.
- Example: Convert 5.6 m to cm → move 2 steps right (m → cm): 5.6 → 560 cm

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