If you're not good at mental addition, check into this problem set and become a master before you're discharged! Each page comes with an inspiring slogan! ⭐️A and B Since current certification exams only feature problems with aligned digits, this problem set will help you improve your concentration. This is the best material for those who: * Get lost in their calculations. * Often skip or forget numbers. * Enter the same number twice. * Subtract in the tens place but add in the ones place (or vice versa). * Always make mistakes when adding (or subtracting) certain numbers. * Often misread numbers (e.g., confusing 69 and 96, or 704 and 740). Many people struggle with borrowing from 100, 500, 1,000, 5,000, or 10,000. I recommend copying the problems without writing on them and practicing repeatedly until you completely memorize them. B5 size (with answers) ⭐️C Since current certification exams only feature problems with aligned digits, this problem set will help you improve your concentration. This is the best material for those who: * Get lost in their calculations. * Often skip or forget numbers. * Enter the same number twice. I recommend copying the problems without writing on them and practicing repeatedly until you completely memorize them. With negative calculations, the sign can change from negative to positive during the process, so it's fun to see "what the final result will be!" When I was practicing for the Shuzan 1st grade, I was excited to solve them. A4 size (with answers) ⭐️Obtaining the Shuzan 1st grade can be used for scholarship applications when entering university. Don't give up at the 2nd grade level. Shuzan materials are not subject to price reductions. If you purchase multiple items and save on shipping, I will adjust the price accordingly, so please comment. #SoronyanShuzanMaterials ← You can see all the Shuzan materials here. Shipping is planned via anonymous Nekopos. Please read the profile carefully❗️carefully❗️carefully❗️ before purchasing without a comment if you have no questions or want to combine items. Soroban Textbook Weakness Overcome Special training Mental addition Mental addition Elderly Brain training Right brain Right brain activation Anti-aging Dementia prevention