Math Strategy - Rounding and Compensating

WALT solve addition equations using the rounding and compensating strategy. 

The thing that I did well is solving the small equations. The thing that was hard for me is doing the rounding and compensating with the really big numbers.  The thing that I think that I could of done is challenge my-self bye using really big numbers. 
My favourite way to solve equations is using place value strategy. 
Click Here If You Want To See My Maths