Question

600кг+400г= 300м+700м= 78кг+22кг= 800кг+200кг= 1р-54к= 1т-200кг= 1кг-500г= 1м-43см=

Answer 1

600кг 400г - 6ц 400г
1км
100кг - 1ц
1т
6коп
800 кг - 8ц
9кг 500г - 9ц 500г
57см - 5дм 7см

Answer 2

Let's solve these arithmetic operations step by step:

1. 600 kg + 400 g = 600 kg + 0.4 kg = 600.4 kg

2. 300 m + 700 m = 300 m + 0.7 km = 300.7 m

3. 78 kg + 22 kg = 78 kg + 22 kg = 100 kg

4. 800 kg + 200 kg = 1000 kg

5. 1 r - 54 kg = It seems there might be a typo or missing information here. "r" is not a standard unit of measurement in the metric system. If you meant "kg" instead of "r," the result would be:

   1 kg - 54 kg = -53 kg

6. 1 t - 200 kg = 1000 kg - 200 kg = 800 kg

7. 1 kg - 500 g = 1 kg - 0.5 kg = 0.5 kg

8. 1 m - 43 cm = 1 m - 0.43 m = 0.57 m

Please double-check the units and values provided in question 5 to get an accurate answer. If you meant something else, feel free to clarify.