Soroban Abacus Mental Math Learning Tool (Includes up to $70 Bonus for fun math learning at MathSecret)

17 stems (columns) of 1 & 4 soroban style abacus. High quality construction, competition grade. Plastic black frame, plastic brown pearls, pressure treated wood stem, and plastic center horizontal divider bar with black dots on every 3 stems. Also includes FREE protective plastic case. Join MathSecret VIP Membership for FREE and get up to bonusContinue reading “Soroban Abacus Mental Math Learning Tool (Includes up to $70 Bonus for fun math learning at MathSecret)”