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E. Concentration

• Concentration module is meant for use at the very beginning

of the program when students are learning abacus numbers.

• This module presents exercises with 1-digit, 2-digit and 2-digit

abacus numbers.

• All you need to do is adjust the speed and run the exercise and
try to identify the abacus number that appears on the screen
and disappears within a fraction of a second.

• Type the number in the answer box. Press “Enter” and see if

your answer is correct.

• First start with one-digit numbers with slow speed. Gradually
increase your speed. When you get proficient enough with
one-digit numbers, then follow the same routine with two-digit
and three-digit numbers.

• Click on the image to watch the video.