Abacus para adicionar números diferentes. A menina em uma lição de matemática acrescenta no ábaco. Método de contagem antiga . - Banco de fotos e imagens

The girl raised her hand in class. The student knows the solution of the task given by the teacher. Eager to answer.

The schoolgirl solves the task. The girl writes in a notebook with a pen. Primary school.

Abacus for adding different numbers. The girl at a math lesson adds on abacus. Old counting method.

The schoolgirl solves the task. The girl writes in a notebook with a pen. Primary school.

Mathematical task. Blackboard. Young teenage girl. He solves the task standing at the school board. I write with chalk on the blackboard.

Long frame. Mathematical task. Blackboard. Young teenage girl. He solves the task standing at the school board. I write with chalk on the blackboard.

Long frame. Mathematical task. Blackboard. Young teenage girl. He solves the task standing at the school board. I write with chalk on the blackboard.

Mathematical task. Blackboard. Young teenage girl. He solves the task standing at the school board. I write with chalk on the blackboard.

Mathematical task. Blackboard. Young teenage girl. He solves the task standing at the school board. I write with chalk on the blackboard.