Download or read book How to Abacus Exercise - 2 Digits 8910 written by Sheena Chin and published by . This book was released on 2019-10-05 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: Having learned abacus formulas, it's time to show off your skills in solving number problems. When you feel comfortable with five, six and seven 2-Digit number arithmetics, you should move on to eight, nine or ten 2-digit number exercises. How to Abacus Exercise has more exercise books waiting for you to practice: 2 digits 34, 2 digits 567, 2 digits 810, 3 digits 36 and 3 digits 810. Check them all out.