A decimeter (dm) is 10 centimeters (cm), so 400 dm would be larger.
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1 cm
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.
4m
Since, 10 cm = 1 dm , 10 cm x 10 cm x 10 cm = 1 dm x 1 dm x 1 dm , Then, 1000 cm^3 = 1 dm^3
To compare 107 cm and 20 dm, we need to convert both measurements to the same unit. Since 1 dm is equal to 10 cm, we can convert 20 dm to cm by multiplying 20 by 10, which equals 200 cm. Now, we can see that 107 cm is indeed smaller than 200 cm, so 107 cm is not bigger than 20 dm.