No, not with unit symbols like "kg".
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GPYNo, not with unit symbols like "kg".So, in 400-kilogramme crocodile, a hyphen is needed. Is that what you mean?
tamguatlaySo, in 400-kilogramme crocodile, a hyphen is needed. Is that what you mean?Strictly speaking I would use a hyphen. However, you may see it without, and it would not be considered a major error.