Grade 3 · Maths · Lessons
Litres, grams and kilograms
🫙jug⚖️scale🥛litres🏋️kilograms
Measuring amounts.The big ideaRead the mark the top reaches. An estimate is close, not exact.
How it works
Read the mark the top of the water or the needle reaches.
Litres measure how much liquid. Kilograms and grams measure how heavy.
An estimate is close, not exact.
Example 1: A scale
- The needle points to the 9 on a kilogram scale.
- Read the number it points to.
- The scale shows 9 kg.
Example 2: Between marks
- The scale marks go up in fives. The needle is on the second mark.
- Count: 5, 10.
- The scale shows 10 kg.
Example 3: A jug
- Water in a jug reaches the 3 mark.
- Read where the top of the water is.
- There are 3 litres.
Words to know
- litre
- A unit for how much liquid.
- kilogram
- A unit for how heavy something is. 1,000 grams.
Watch out
- Check what each mark counts for.
- Say the unit: litres or kilograms.
- An estimate doesn't need to be exact.
Try it
- A jug is filled to the 4 mark. How many litres?
- A scale's marks go up by 5. The needle is on the third mark. How many kg?
- Which unit measures liquid: litres or kilograms?
- Which unit measures how heavy: litres or kilograms?
Answers: 1. 4 · 2. 15 · 3. litres · 4. kilograms
For grown-upsFill a jug at bath time and ask how many litres are in it, checking the marks.