These are selling for up to $149.50 on Amazon. This is the hardback edition and in good condition, It has 587 Pages of math problems and it has all the answers in the back there's 30 Chapters starting with place value and number sense all the way to explore and coordinate grid it explains everything very well and helps with algebra and geometry decimals and fractions, analyze and graphs multiplication and division plane figures metric measurements, solid figures and volume, perimeter and area of plane figures solid figures and volume and everything in between, there's a student handbook in the back for self testing and the answers, there's just too much to list so if you have any questions please feel free to contact me and thanks for looking...ISBN# 0-15-320748-5 I also want to let you know that I will sell multiple items for a discount price. I also want to let you know that I will sell multiple items for a discount price.