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- IXL Official Site | Math Practice, Ages 4-18
  https://www.ixl.com › math
  赞助Unlimited math practice with meaningful, up-to-date tracking on your child's progress. IXL is easy online learning designed for busy parents. Used by 15M students worldwide.
  Courses: Math, English, Science, Social Studies, Spanish
  - IXL K-12 Math Practice ·
  - Multiplication ·
  - Addition ·
  - Geometry