#
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

Fill the picture will the given objects, such that the sum of each equals .

### 7: Bow tie

Fill the picture will the given objects, such that the sum of each equals .

### 9: M

Fill the picture will the given objects, such that the sum of each equals .

### 5: V

Fill the picture will the given objects, such that the sum of each equals .

### 9: W

Fill the picture will the given objects, such that the sum of each equals .

### 7: Asterisk

Fill the picture will the given objects, such that the sum of each equals .

### 8: Square

Fill the picture will the given objects, such that the sum of each equals .

### 5: Cross

Fill the picture will the given objects, such that the sum of each equals .

### 7: Cube

Fill the picture by the given objects, such that the sum of elements bounding each colored region is equal to .

### 9: Square + diagonals

Fill the picture by the given objects, such that the sum of elements bounding each colored region is equal to .

### 9: Four squares

Fill the picture by the given objects, such that the sum of elements bounding each colored region is equal to .

### 8: Grill

Fill the picture will the given objects, such that the sum of each equals .

### 8: House

Fill the picture by the given objects, such that the sum of elements bounding each colored region is equal to .

### ~10: Pentagon

Fill the picture will the given objects, such that the sum of each equals .

### ~10: Pentagram

Fill the picture by the given objects, such that the sum of each is equal to .

### 7: Pizza 3

Fill the picture by the given objects, such that the sum of elements bounding each colored region is equal to .

### 9: Pizza 4

Fill the picture by the given objects, such that the sum of elements bounding each colored region is equal to .

### 3: Pyramid I

Fill the picture by the given objects, such that each box at an upper level equals the sum of the two boxes immediately below it.

### 5: Pyramid Ib

Fill the picture by the given objects, such that each box at an upper level equals the sum of the two boxes immediately below it.

### 7: Pyramid Ic

Fill the picture by the given objects, such that each box at an upper level equals the sum of the two boxes immediately below it.

### 9: Pyramid Id

Fill the picture by the given objects, such that each box at an upper level equals the sum of the two boxes immediately below it.

### 6: Pyramid II

Fill the picture by the given objects, such that each box at an upper level equals the sum of the two boxes immediately below it.

### 9: Pyramid IIb

Fill the picture by the given objects, such that each box at an upper level equals the sum of the two boxes immediately below it.

### ~10: Pyramid III

Fill the picture by the given objects, such that each box at an upper level equals the sum of the two boxes immediately below it.

### 6: Stool

Fill the picture will the given objects, such that the sum of each equals .

### 8: Three squares

Fill the picture by the given objects, such that the sum of elements bounding each colored region is equal to .

### 5: Bow tie

Fill the picture by the given objects, such that the sum of elements bounding each colored region is equal to .

### 6: Triangle

Fill the picture will the given objects, such that the sum of each equals .

### 6: Two squares

Fill the picture by the given objects, such that the sum of elements bounding each colored region is equal to .
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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, addition, sum, fraction, decimal, relative number, root, complex number, arithmetics