Free Metric Conversion Worksheet Answer Key for Kids - Free Printable

Let's solve this step by step. The worksheet is about converting metric units of length, comparing lengths, and determining the largest amount in each group.

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🔹 Part 1: Converting Metric Units

We'll use these conversion facts:
- 1 cm = 10 mm
- 1 m = 100 cm
- 1 km = 1000 m

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#### Conversions

1) 1.8 cm = ___ mm
→ 1.8 × 10 = 18 mm

2) 0.2 cm = ___ mm
→ 0.2 × 10 = 2 mm

3) 13 ½ cm = ___ mm
→ 13.5 × 10 = 135 mm

4) 4.9 cm = ___ mm
→ 4.9 × 10 = 49 mm

5) 1.6 m = ___ cm
→ 1.6 × 100 = 160 cm

6) 2.61 m = ___ cm
→ 2.61 × 100 = 261 cm

7) 0.3 m = ___ cm
→ 0.3 × 100 = 30 cm

8) 4.07 m = ___ cm
→ 4.07 × 100 = 407 cm

9) 1.9 km = ___ m
→ 1.9 × 1000 = 1900 m

10) ¼ km = ___ m
→ 0.25 × 1000 = 250 m

11) 3.28 km = ___ m
→ 3.28 × 1000 = 3280 m

12) 5.802 km = ___ m
→ 5.802 × 1000 = 5802 m

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✔ Answers for conversions:
1) 18 mm
2) 2 mm
3) 135 mm
4) 49 mm
5) 160 cm
6) 261 cm
7) 30 cm
8) 407 cm
9) 1900 m
10) 250 m
11) 3280 m
12) 5802 m

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🔹 Part 2: Which is the most? Circle the largest amount in each box.

We need to convert all values in each box to the same unit (preferably meters), then compare.

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#### Box 1:
- 1020 m → 1020 m
- 1.2 km → 1.2 × 1000 = 1200 m ✔
- 19,000 cm → 19,000 ÷ 100 = 190 m

➡️ Largest: 1.2 km (already circled — correct)

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#### Box 2:
- 1.5 m → 1.5 m
- 128 cm → 128 ÷ 100 = 1.28 m
- 1520 mm → 1520 ÷ 1000 = 1.52 m

→ Compare: 1.5 m, 1.28 m, 1.52 m
➡️ Largest: 1520 mm = 1.52 m

✔ Circle: 1520 mm

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#### Box 3:
- 2730 m → 2730 m
- 36,000 cm → 36,000 ÷ 100 = 360 m
- 2.59 km → 2.59 × 1000 = 2590 m

→ Compare: 2730 m, 360 m, 2590 m
➡️ Largest: 2730 m

✔ Circle: 2730 m

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#### Box 4:
- 3.8 m → 3.8 m
- 309 cm → 309 ÷ 100 = 3.09 m
- 3160 mm → 3160 ÷ 1000 = 3.16 m

→ Compare: 3.8 m, 3.09 m, 3.16 m
➡️ Largest: 3.8 m

✔ Circle: 3.8 m

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🔹 Part 3: Use >, <, or = to compare

Convert both sides to same unit (usually meters).

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1) 1.5 m ___ 127 cm
→ 127 cm = 1.27 m
→ 1.5 > 1.27 → >

2) 1.95 km ___ 1564 m
→ 1.95 km = 1950 m
→ 1950 > 1564 → >

3) 28 mm ___ 2.8 cm
→ 28 mm = 2.8 cm
→ =

4) 87 cm ___ 0.9 m
→ 87 cm = 0.87 m
→ 0.87 < 0.9 → <

5) 1240 m ___ 1.3 km
→ 1.3 km = 1300 m
→ 1240 < 1300 → <

6) 6.3 cm ___ 69 mm
→ 6.3 cm = 63 mm
→ 63 < 69 → <

7) 145 mm ___ 1.8 cm
→ 145 mm = 14.5 cm
→ 14.5 > 1.8 → >

8) 2.08 km ___ 2080 m
→ 2.08 km = 2080 m → =

9) 3.4 m ___ 309 cm
→ 309 cm = 3.09 m
→ 3.4 > 3.09 → >

10) 529 cm ___ 5.6 m
→ 529 cm = 5.29 m
→ 5.29 < 5.6 → <

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✔ Final Answers:

#### Conversions:
1) 18 mm
2) 2 mm
3) 135 mm
4) 49 mm
5) 160 cm
6) 261 cm
7) 30 cm
8) 407 cm
9) 1900 m
10) 250 m
11) 3280 m
12) 5802 m

#### Which is the most?
- Box 1: 1.2 km ✔ (already circled)
- Box 2: 1520 mm
- Box 3: 2730 m
- Box 4: 3.8 m

#### Comparison:
1) >
2) >
3) =
4) <
5) <
6) <
7) >
8) =
9) >
10) <

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