Mass: kg and g
Mass is how heavy something is. In everyday life we often use kilograms (kg) for vegetables, fruit, or luggage. 1 kg = 1000 g — grams are useful for lighter things. If you know the mass of one item in kilograms and how many you have, total mass = mass of one × quantity. For example, a watermelon weighs 5 kg and you buy 3 → 5 × 3 = 15 kg.
1 kg = 1000 g
Total mass (kg) = mass of one (kg) × quantity
Example: one bag of potatoes is 3 kg, you take 4 bags → 3 × 4 = 12 kg
Practice finding total mass
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