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Weight

Measurement

Japanese school year: Elementary 3

What you learn

Learn units of weight such as grams and kilograms, and how to read scales correctly. These measurement skills are essential when weighing cooking ingredients or checking luggage in daily life. Prior understanding of basic measurement units and multi-digit addition and subtraction will make calculations easy and intuitive.

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Key points

This formula is used to convert weight units between kilograms and grams. 1 kg1\,\mathrm{kg} is equal to 1000 g1000\,\mathrm{g}.

1 kg=1000 g1\,\mathrm{kg} = 1000\,\mathrm{g}

This formula is used to convert weight units between tons and kilograms for heavy objects. 1 t1\,\mathrm{t} is equal to 1000 kg1000\,\mathrm{kg}.

1 t=1000 kg1\,\mathrm{t} = 1000\,\mathrm{kg}

This formula is used to convert small weight units between grams and milligrams. 1 g1\,\mathrm{g} is equal to 1000 mg1000\,\mathrm{mg}.

1 g=1000 mg1\,\mathrm{g} = 1000\,\mathrm{mg}

This is the rule for adding or subtracting weights. When different units are present, always convert them to the same unit (such as g\mathrm{g} or kg\mathrm{kg}) before calculating.

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