US: temporary delays — postal services aligning new import rules, 
Europe: 1–2 weeks, 🌍 Worldwide: 1–4 weeks ✈️Loading...
This workbook is designed to teach mathematical and numerical reasoning techniques specifically for the tens number system. Each concept is presented with a clear explanation, followed by a worked example to illustrate the method. Ample practice questions are provided to reinforce learning and build confidence in young learners.