472  WorkRate1
2

Name : _________________

refresh

12 people can do a job in 12 days. How many days would it take if there were only 4 people?



16 people can do a job in 5 days. How many days would it take if there were only 4 people?



12 people can do a job in 12 days. How many days would it take if there were only 6 people?



4 people can do a job in 5 days. How many days would it take if there were only 2 people?



42 people can do a job in 9 days. How many days would it take if there were only 7 people?

56 people can do a job in 5 days. How many days would it take if there were only 8 people?



36 people can do a job in 6 days. How many days would it take if there were only 9 people?



15 명의 일꾼들이 어떤일을 끝내는데 5 일이 걸린다. 만일 3 명의 일꾼들이 하면 며칠 걸려 끝내겠는가?



15 people can do a job in 9 days. How many days would it take if there were only 5 people?



28 people can do a job in 12 days. How many days would it take if there were only 7 people?

+(         )

(         )+

++[[          ]]++