Geese. Counting within 20. 48 cards

Add and subtract numbers within 20 (colored side of the cards).

Choose a card from the stack with a model scheme.

Familiarize yourself with the content of the card.

Ask the child to find the value of the numerical expression using the model scheme.

The child can check the correctness of their answer by matching it with the second half of the card.

Examine the mathematical notation on the right half and suggest the child to construct mathematical reasoning based on this notation.

It is recommended to master counting within 20 in stages: 1. Addition and subtraction with round numbers. 2. Addition and subtraction without crossing the ten. 3. Addition and subtraction that involves crossing the ten.

Practice the skill of mental arithmetic (black and white side of the cards).

Take any card with a numerical expression and find the value of the expression.

Among the remaining cards, choose a card with the same value of the numerical expression.

The strips on the cards will help verify the correctness of the answer.

To reinforce the learning material, four test cards are provided.

A brief theory in diagrams and tables will help successfully complete the tasks.

Games with the cards will help the child learn to count quickly and accurately within 20, memorize the basic arithmetic rules.