90 hrafichnykh matematychnykh zadach [90 Graphical Mathematical Problems]

Each assembly task is presented graphically and looks like a puzzle. Therefore, performing these tasks turns into a game in which children learn to see general schemes and stages of solving various types of problems, develop logic and train computational skills. This form eliminates the need to explain educational material to children - it is learned intuitively. The author offers readers to forget about mathematics and just solve riddles.