Idea 11of 23Builds onThe price for one litreChange kilograms to grams first
Change litres to millilitres first
How do you compare a bottle in litres with one in millilitres?
Today you'll discover
- how many millilitres are in a litre
- how to compare per 100 mL
- a small bottle that wins
Think first500 mL for $1.50, or 2 L for $5.00
Juice: 500 mL for $1.50, or 2 L for $5.00. Which costs less per 100 mL?
Decide first, then press Next. Put both bottles in millilitres before you divide.
A 500 mL bottle of juice for $1.50 and a taller 2 L bottle for $5.00. Under the tags, the lines 500 mL = 5 × 100 mL and 2 L = 2000 mL = 20 × 100 mL, with bars cut into 5 and 20 parts. Then $1.50 ÷ 5 = $0.30 and $5.00 ÷ 20 = $0.25. Along the bottom, the $0.25 bar is ticked. The last step asks about hand soap.
See the whole ideathe big idea and the key word, in one place
The big idea
Change litres to millilitres first, 1 L = 1000 mL, then compare per 100 mL.
Litres to millilitres
Multiply by 1000: 1 L = 1000 mL, 2 L = 2000 mL. Then count the parts of 100 mL.
- 1 L1000 mL
- 2 L2000 mL
- parts of 100 mL20
Easy to get wrongSometimes the small bottle wins. Converting tells you; the size of the bottle does not.
Key word
- millilitre
- a small unit of capacity; 1000 millilitres make 1 litre, written mL
Ready to use it?
- Change litres to millilitres before comparing.
- Compare two drinks in different units.