12т 34кг-3456кг

To convert 12 tons to kilograms, you need to multiply it by the conversion factor. Since 1 ton is equal to 1000 kilograms, you can calculate this as:

12 tons * 1000 kilograms/ton = 12,000 kilograms

So, 12 tons is equal to 12,000 kilograms.

To subtract 3456 kilograms from 34 kilograms, you can simply subtract them like regular numbers:

34 kilograms - 3456 kilograms = -3422 kilograms

So, the result of subtracting 3456 kilograms from 34 kilograms is -3422 kilograms.