500 Math Crossword Puzzles for Kids, Level 3

500 cross-number puzzles that bring fractions to all four operations, for Grades 4–6 (ages 9–12). A single puzzle blends whole numbers and simple proper fractions like 1/2, 2/3, and 3/4 — added, subtracted, multiplied, and divided — with friendly denominators that keep it mental math, no calculator. Every puzzle has a QR code — and a searchable ID — to solve and self-check online for free, no app needed. Large-print, 4 puzzles per page, with a complete answer key.