Saving for a pet

This task is about showing how to solve some addition problems with money.
 
a) Maraea is saving to buy a cat. In 3 weeks she has saved $9, $56 and $72. Show how to work out how much she has saved altogether.

 
 
 
 
Total money saved: $__________  
 
b) Tom is saving to buy a dog.  In 4 months he has saved $36, $78, $203, and $123.  Show how to work out how much he has saved altogether.

 
 
 
 
Total money saved: $__________  
 
c) Te Ao is saving to buy a horse.  So far she has saved $17, $160, $72, and $148.  Show how to work out how much she has saved altogether.

 
 
 
 
Total money saved: $__________