Level 2
Jonathan paid $18.40 for a CD. He bought another MP3 player which cost 4 times as much as the CD. What was the total cost of the MP3 player and the CD?
Level 3
Tank A holds 3 ℓ 485 mℓ of water. Tank B holds twice as much water as Tank A. Find the total amount of water in the 2 tanks. (Give the answer in litres and millilitres.)