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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