Powerful twenty five

This task is about how you multiply or divide numbers by twenty five.
Answer each problem below and describe how you actually did it.  If you did it in your head, try and show your thinking. State any number facts you used.


a) Show how to solve 25 × 3.

Show your working.
 
 
 
 
 

Answer: __________ 


b) Show how to solve 25 × 8.

Show your working.
 
 
 
 
 

Answer: __________


c) Show how to solve 25 × 25.

Show your working.
 
 
 
 
 

Answer: __________

 
 
 
 
 

d) Show how to work out how many classes of exactly 25 students could be made with 450 students.

Show your working.
 
 
 
 
 

Answer: __________