Abacus learning not only helps with the basic calculations like addition, multiplication, subtraction, and division, it also helps in effective counting of decimal points, negative numbers, etc. When students learn to use an abacus, they use their hands and a tool with beads to calculate numbers.
Abacus helps the student's memory in two ways. The first way, student no longer has to memorize answers to arithmetic problems. The second way the abacus helps their memory is that on the abacus they can see very concretely how they got the answer.