Mixed and Mastering
5 videos • 8,849 views • by The Abacus Maestro This is Level - 3 of Abacus education. After being perfect in 5's & 10's complements concepts you should concentrate on Mixed complements or Mixed friends.....once you become perfect in these concepts you should do proper practice. Later you should watch Mastering complements videos, here we are going to start teaching how to problems in 10's & 100's place combinations....