Ding+Dent = DAMAGED PRODUCT! Slight damage to product during shipping. Could be a dented cover, slight damage to the spine etc. Damaged is minor in most cases and books are still very useable. Discount reflects level of damage in each product. Damaged product not refundable or returnable. Math.U.See Beta Addition and subtraction for single-digit numbers and other topics. Beta builds on the foundation in Alpha by applying students’ mastery of single-digit addition and subtraction to multiple-digit addition and subtraction. One of the stepping stones between these two levels is the concept of place value, which is an important milestone for truly grasping any multiple-digit operation. Major Concepts and Skills Include: Understanding place value and using it to add or subtract Fluently adding any combination of whole numbers Solving for an unknown addend Fluently subtracting any combination of whole numbers Solving abstract and real-world problems involving addition and subtraction Additional Concepts and Skills: Telling and writing time by hours and minutes Understanding, adding, and subtracting NZ currency Measuring and estimating length with inches, feet, centimeters, and meters Comparing numbers and lengths Expressing differences between numbers as inequalities Finding the perimeter of any polygon Representing and interpreting data in plots and graphs Beta Instruction Pack includes: Instruction Manual & DVD Beta Student pack includes: Student Workbook & Test & Activity booklet. Grab an extra Student Pack for an additional Student. For a complete set to get started with Math.U.See you will need to purchase the Integer Block set (a one of purchase for use with ALL levels of Math.U.See), the Beta instruction pack & Beta Student Pack For more Information, sample videos & lessons see Math.U.See.com