Work in pairs. Look at the photos and discuss the following questions: • Who are these people? • What do you know about them? • Why do you think they have in common?

1) 2*10=20 л взяли воды
2) 20+2=22 л получилось морса

1) 1+10=11 частей всего
2) 11*2=22 л морса всего