#
Additive figures
--- Introduction ---

This module contains for the time being 29 visual training activities
of arithmetics (addition, substraction), which can be considered either as
exercises or recreations.

These are all ``drag & drop'' activities, consisting of placing numbers or
expressions into a picture, with geometric conditions on theirs sums. The
first number in the list indicates the number of objects to place. With a
wide variation of styles and difficulty levels in order to meet various
requirements.

### 7: H

### 7: Bow tie

### 9: M

### 5: V

### 9: W

### 7: Asterisk

### 8: Square

### 5: Cross

### 7: Cube

### 9: Square + diagonals

### 9: Four squares

### 8: Grill

### 8: House

### ~10: Pentagon

### ~10: Pentagram

### 7: Pizza 3

### 9: Pizza 4

### 3: Pyramid I

### 5: Pyramid Ib

### 7: Pyramid Ic

### 9: Pyramid Id

### 6: Pyramid II

### 9: Pyramid IIb

### ~10: Pyramid III

### 6: Stool

### 8: Three squares

### 5: Bow tie

### 6: Triangle

### 6: Two squares

The most recent version

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Description: place numbers in geometric figures according to conditions on sums. interactive exercises, online calculators and plotters, mathematical recreation and games

Keywords: interactive mathematics, interactive math, server side interactivity, algebra,arithmetic, addition, fraction, decimals, relative_number, roots, complex_number