Note that "milli-" means "thousandths of a unit" and "deci-" means "tenths of a unit".
This means:
1 m = 1000 mm
1 m = 10 dm
Combine these conversions altogether to get:
1 mm = 1.0 x 10-3 m = 1.0 x 10-2 dm
Another way of interpreting this is 1 dm = 100 mm. Therefore, 200 mm is 2 dm.
200mm = 20cm
25cm is longer than 200mm which equals 20cm
1 dm = 1 cm → 1 dm² = 1 dm × 1 dm = 10 cm × 10 cm = 100 cm² → To convert dm² to cm² multiply by 100 → 5 dm² = 5 × 100 cm² = 500 cm².
400
2dm
600,000mm
200mm = 20cm
20cm=200mm
25cm is longer than 200mm which equals 20cm
1 m = 10 dm so 0.85 m = 8.5 dm
5 ft = 15.24 dm
There are 10mm in 1cm, so 200mm is 20cm
10 cm = 1dm ⇒ 150 cm = 150 ÷ 10 dm = 15 dm
1 cm is equal to 10 dm
1 dm = 1 cm → 1 dm² = 1 dm × 1 dm = 10 cm × 10 cm = 100 cm² → To convert dm² to cm² multiply by 100 → 5 dm² = 5 × 100 cm² = 500 cm².
A cm is ten times smaller than a dm
8mm diameter bars at 200mm x 200mm square spacing