A 4th-grade spiral math review packet themed as a 'Case Cracker' detective notebook. Consists of 8 pages with 36 total questions. Covers place value, division, multiplication, decimals (now includes 20 - 8.45), area/perimeter, unit conversions, data analysis, fractions (with improved mixed number layout), angle degree measures, and in/out grids. Navigation section removed as requested, and everything has been renumbered for a seamless flow. Layout refined for optimal readability.