The well known Abacus, an excellent tool to teach your kids counting, maths operations and let him play with numbers.
How to use:
1- The beads in the lower part have the following values: we assign the beads in the rightmost column a value of 1. Then we subsequently assign a value of 10 to the column to its left, and a value of 100 to the column further left and so on and so forth.
2- The beads in the upper part are worth five times the value of the beads in the lower part.
3- The value of the abacus will be given in the total field, and each column's value is given under the column.
With Family Sharing set up, up to six family members can use this app.