Education
Learn by doing: an online abacus with guided lessons and practice questions.
How do you use an online abacus?
The online abacus is the school counting frame with ten rods of ten beads each; sliding beads to the left shows numbers and makes addition and subtraction concrete.
Step-by-step lessons go from counting up to regrouping, and the practice section reinforces what you have learnt.
Frequently Asked Questions
What age is the abacus for?
The counting frame is mostly used in preschool and early primary years, but it helps with mental arithmetic at any age.
Is it free?
Yes. The abacus and its lessons are free and run in the browser.