Estimating lots

This task is about estimating with multiplication.

Do NOT use a calculator for these tasks.

              

a)
Each of these 5 pots has 387 gold coins in it.
 
  i) In the box below show how you would ESTIMATE (using simple sums and without using a calculator) the number of gold coins in the 5 pots.
  

 

 

 

 

  

   
ii)
 
My estimate of the number of coins in the 5 pots is ___________.
 

 


 

b)
A telephone book has 502 pages of numbers. Each page has 4 columns and each column has an average of 73 telephone numbers.
 
  i) In the box below, show how you would ESTIMATE (using simple sums and without using a calculator) the total number of phone numbers in the telephone book.
  

 

 

 

 

 

   

   
ii)
 
My estimate of the total number of telephone numbers is ___________.