Question

31-2/4-21+3/3=2/3-1 ​

Answer 1

The Metric System of Measurements uses the mass units: gram (g), kilogram (kg) and tonne (t).

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Mass (weight) Units.

1 gigatonne (Gt) =1 000 000 000 000 000 g

1 tonne (t) =1 000 000 g

1 kilogram (kg) =1 000 g

1 gram (g) =1 g

1 milligram (mg) =0.001 g

Answer 2

Answer:

refer to the attachment (◕ᴗ◕✿)(◕ᴗ◕✿)