Measurements — Chapter Summary

Length tells us how long something

Length tells us how long something is. We measure it in millimetres (mm), centimetres (cm), metres (m), and kilometres (km). 1 m = 100 cm, 1 cm = 10 m

Weight tells us how heavy something

Weight tells us how heavy something is. It is measured in grams (g) and kilograms (kg). 1 kg = 1000 g.

Capacity tells us how much

Capacity tells us how much a container can hold. It is measured in millilitres (mL) and litres (L). 1 L = 1000 mL.

Changing one unit to another

Changing one unit to another, like metres to centimetres or kilograms to grams, by multiplying or dividing by 100 or 1000.

We can add or subtract lengths

We can add or subtract lengths, weights, or capacities by aligning the same units and carrying or borrowing when needed, just like regular numbers.