making tens      1st ppt

Friendly numbers     2nd ppt

Making Landmarks     3rd ppt

Place value    5th ppt

adding up     7th ppt

Partial products   9th ppt

breaking factors    11th ppt

Doubles & near doubles   4th ppt

adding in chunks    6th ppt

friendly numbers   8th ppt

doubling and halving with multiplication  10th ppt

partial quotients   12th  ppt