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Lvl 2

22cm cause 2dm is 20cm and you just have to add 2cm

Lvl 1

22cm

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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.

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2 m

1 dm = 10 cmso, (1 dm)2 = (10 cm)2 = 100 cm2

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2 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.

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By unit of length and distance and conversion ,we can say that 1 dm =10 cm 2 dm=20 cm hence ,2 dm >18 cm

10 cm = 1 dm 20 cm = 2 dm

1 dm = 10 cm 1/5 dm = 2 cm

8

Putting them in a common unit is a great start. 200 mm is equal to 0.2 m, 22 dm is equal to 2.2 m and 22 cm is equal to 0.22 m. Therefore, the order from least to greatest is 200 mm, 22 cm, 2 m and 22 dm.

2 m

1 decimeter = 10 centimeters20 cm are in 2 dm.

1 dm = 10 cmso, (1 dm)2 = (10 cm)2 = 100 cm2

They are not explicitly marked in normal rulers. But they are at the 10 centimetres (1 decimetre), 20 cm (2 dm) and 30 cm (3 dm) marks.