Metric Measurement Worksheets: Centimeters (cm), Millimeters (mm ... - Free Printable

Let's solve the worksheet step by step.

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Part 1: Complete the table.

We are given a table with centimeters (cm) and need to convert them to millimeters (mm).

Conversion Rule:
1 cm = 10 mm

So, multiply each centimeter value by 10 to get millimeters.

| Centimeters | Millimeters |
|-------------|-------------|
| 1 | 1 × 10 = 10 |
| 3 | 3 × 10 = 30 |
| 12 | 12 × 10 = 120 |
| 40 | 40 × 10 = 400 |
| 145 | 145 × 10 = 1450 |

✔ Completed Table:
| Centimeters | Millimeters |
|-------------|-------------|
| 1 | 10 |
| 3 | 30 |
| 12 | 120 |
| 40 | 400 |
| 145 | 1450 |

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Part 2: Circle the greater length for each pair.

We compare two lengths in each pair. Remember:
- 1 cm = 10 mm → so we can convert everything to the same unit to compare.

#### a. 4 cm vs 45 mm
Convert 4 cm to mm:
4 cm = 4 × 10 = 40 mm
Now compare:
40 mm vs 45 mm → 45 mm is greater

✔ Answer: Circle 45 mm

#### b. 50 mm vs 6 cm
Convert 6 cm to mm:
6 cm = 6 × 10 = 60 mm
Compare:
50 mm vs 60 mm → 60 mm is greater, so 6 cm is greater

✔ Answer: Circle 6 cm

#### c. 800 cm vs 1,000 mm
Convert both to same unit. Let's convert to mm:
- 800 cm = 800 × 10 = 8,000 mm
- 1,000 mm = 1,000 mm
Compare:
8,000 mm vs 1,000 mm → 800 cm is greater

✔ Answer: Circle 800 cm

#### d. 3,200 mm vs 340 cm
Convert 340 cm to mm:
340 cm = 340 × 10 = 3,400 mm
Compare:
3,200 mm vs 3,400 mm → 3,400 mm is greater, so 340 cm is greater

✔ Answer: Circle 340 cm

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Part 3: Measure to the nearest centimeter and/or nearest millimeter.

We have two images to measure: a pencil and a key.

#### Pencil Measurement:

Look at the ruler under the pencil:

- The pencil starts at 0 cm.
- It ends between 7 cm and 8 cm, closer to 7.5 cm.
- Looking at the millimeter marks: the end is at about 7.5 cm or 75 mm.

But let’s read it carefully:

- Each centimeter has 10 small marks (millimeters).
- The pencil ends at the 5th mark after 7 cm, which is 7.5 cm or 75 mm.

Nearest centimeter:
7.5 cm rounds to 8 cm (since 0.5 rounds up)

Nearest millimeter:
It's exactly on the 5 mm mark after 7 cm → 75 mm

✔ Answers:
- Nearest cm = 8 cm
- Nearest mm = 75 mm

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#### Key Measurement:

Now the key:

- Starts at 0 cm.
- Ends just before the 4 cm mark.
- Looks like it ends at about 3.8 cm or 38 mm.

Looking closely:
- The end is between 3 and 4 cm.
- It's past the 3.5 cm mark, but not quite at 4.
- It appears to be at 3.8 cm or 38 mm.

Nearest centimeter:
3.8 cm → rounds to 4 cm

Nearest millimeter:
It's at 38 mm

✔ Answers:
- Nearest cm = 4 cm
- Nearest mm = 38 mm

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✔ Final Answers:

#### Part 1: Table
| Centimeters | Millimeters |
|-------------|-------------|
| 1 | 10 |
| 3 | 30 |
| 12 | 120 |
| 40 | 400 |
| 145 | 1450 |

#### Part 2: Greater Length
a. 45 mm
b. 6 cm
c. 800 cm
d. 340 cm

#### Part 3: Measurements
- Pencil:
- Nearest cm = 8 cm
- Nearest mm = 75 mm
- Key:
- Nearest cm = 4 cm
- Nearest mm = 38 mm

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