コツ解説付で誰でも暗算できる！４桁足し算の暗算脳トレ全２０問！徐々に制限時間短くります！

◆About this video This is a brain training exercise for solving four-digit addition problems mentally. If you follow the method explained in the first half of this video, you'll find mental calculations easier. Continuing to add while remembering the numbers in the middle of the calculation is a great brain exercise for strengthening your temporary memory. Improving your temporary memory can help you think faster and potentially improve your intelligence. Try your best to get all the questions right! ◆◆◆Table of Contents◆◆◆ 0:00 Introduction & Explanation 0.29 Memory Check Question 0:41 Tips and Tricks for Four-Digit Addition 3:04 Questions 1- 8:31 Questions 11- ◆◆◆About the Materials Used in This Video◆◆◆ The audio for this video is provided by Ondoku-san. Ondoku-san: https://ondoku3.com/