Logic, deduction, education.

Basic problems

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Info: problem solving

Info: problem solving

Basic additive problems

Basic additive problems

Basic multiplicative problems

Basic multiplicative problems

Composition problems Composition problems

B1
Initiation to the additive bar diagram

Initiation to the additive bar diagram

B2
Initiation to "Plus-Minus" machine

Initiation to "Plus-Minus" machine


C1
Composition problems with bar diagrams

Composition problems with bar diagrams

C2
... with marbles

... with marbles

C3
... with liquids

... with liquids

C4
... with decimal numbering dominoes

... with decimal numbering dominoes

C5
...with balances

...with balances

Transformation problems Transformation problems

D1
Transformation problems with bar diagrams

Transformation problems with bar diagrams

D2
... with marbles

... with marbles

D3
... with liquids

... with liquids

D4
... with decimal numbering dominoes

... with decimal numbering dominoes

D5
...with balances

...with balances

Comparison problems Comparison problems

E1
Comparison problems with bar diagrams

Comparison problems with bar diagrams

E5
...with Roberval balance

...with Roberval balance

Training and evaluation Training and evaluation

F1
Training, evaluation with additive bar diagrams

Training, evaluation with additive bar diagrams

Multiplication, division Multiplication, division