Interactive Maths Resources: VELS Levels 3-4 (this site has moved to onlinemaths.globalteacher.org.au)

Solve subtraction problems by first expanding both numbers.

http://www.wmnet.org.uk/wmnet/custom/files_uploaded/uploaded_resources/851/DecompExpandv2.swf

Solve addition problems where you have to add three numbers using the addition algorithm.

http://www.freewebtown.com/weddell/mw/add_sub/3d_3d_3d_add.swf

Solve addition problems using the addition algorithm

http://www.freewebtown.com/weddell/mw/add_sub/3d_3d_add.swf

A teaching tool which demonstrates expanded addition of large numbers including decimals.

http://www.wmnet.org.uk/wmnet/custom/files_uploaded/uploaded_resources/850/AddExpand.swf

Visually demonstrate using MAB how to add 2- and 3-digit numbers.

http://www.harcourtschool.com/activity/elab2004/gr3/3.html