Tables/Number bonds for Excel reusable spreadsheets

Reusable mixed ability spreadsheets for Excel / Open Office covering simple weekly times table and number bond tests; times tables and their relationship to fraction parts; consecutive tables link to fraction parts of a number (e.g. 3 x 4 = 12 so 4 is 1/3. 8 is 2/3, etc.) emphasis on inverse relationship number families; algebraic tasks where factors, products or fraction of amounts have to be found; table grid practice for integers and decimal values. I.W.B. versions with working models to give children practice as required with consecutive or random multiplication/division tables. All sheets can be reused time and again with the press of the F9 key to generate new numbers with answers (can be displayed on I.W.B. for self-marking and repeated demonstration) and print to A4 to allow as much practice as required with additional sheets for lessons or extra homework practice.