The following worksheets ask the student to either read or write a number represented on a place value abacus.
Here, the student is being asked to draw circles on the abacus to represent the number 77. The correct answer is to draw seven circles on each of the columns.
In this case, the child is being asked to write the number being shown on the abacus. The answer is 41, as there are four circles on the tens column, and one on the units.