Mathematics with scissors. 4th edition. Katz Zh.

Many believe that mathematics are only examples and text tasks.

We bring to your attention a notebook with tasks at the junction of mathematics, design, origami and needlework. Indeed, even for primary school students, you can come up with many practical and interesting tasks in geometry.

You will need convenient scissors, a punch, ruler and pencil. It is better to solve such problems in practice, cutting out all paper tasks. And when you accumulate some experience, you can try to solve such problems in the mind.

Tasks with cutting the windows of the desired form help to develop spatial thinking and logic, the ability to understand the scheme, and at the same time develop the dexterity of the hands.

Tasks in the notebook are built from simple to complex, and it is better to perform them sequentially, one after another. But in the end, you and your children will learn to come up with the same interesting tasks, make beautiful cards, meaningful to cut symmetrical pictures, unusual snowflakes and round dances, and according to your schemes and ornaments.

Tasks for symmetry like “Dorce the second Part of the picture ”often cause difficulties among preschoolers. And this is not by chance - the idea of ​​symmetry is not as simple as it seems. To confidently understand this topic, you need practice. You can draw axis of symmetry in drawn figures, but it is much more important to take scissors and find out all the answers on personal experience: do not try to guess, but try and check which windows can turn out if we cut out a triangle on the leaf fold.

For cutting multi -layer figures, it is convenient to take thin paper, for example, thin and strong square sheets of paper for origami. For snowflakes, it is better to fold a sheet of paper in 12 layers. But it is difficult to cut out 12 layers of paper at once, so we repeat the same patterns on the right and left and cut only 6 layers at the same time.

We hope that after our tasks you will be on the shoulder of any task for symmetry! Interesting tasks for you, friends!