Tangram

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FRACTION MAGIC SQUARES

A magic square is a set arrangement of numbers, usually whole numbers, in a square grid, where each row, column and diagonal adds up to the same value, called 'magic number'.

Magic squares are known from ancient times. Arab mathematicians already knew them as early as the 7th century. They may have learned about them from the Indian culture or perhaps from China.

Magic squares have also been used by different artists over the last centuries, sometimes with allegorical meaning.

Magic squares can contain fractions, like these examples. Try to fill them up. It will be easier if you express all the fractions with a common denominator!

Get the pdf file clicking here

This printabe worksheet has been taken from http://www.learn-with-math-games.com/. 

LACASITOS COOKIES RECIPE

2016 POLYHEDRON CALENDARS

Find calendars for the new year 2016 in 3-dimensional models of the conventional cut-out, fold-up and glue polyhedrons: 

POLYHEDRON CALENDARS

These are the unfolded tetrahedron and triangular prism calendars:

FLEXTANGLES (CALEIDOCICLOS)

Relax and enjoy these last days before Xmas by colouring and folding up this paper toy called 'flextangle'.

This is the printable template ready for colouring and cutting:

CALEIDOCICLOS

Estos "juguetitos poliédricos" reciben el nombre de "caleidociclos". Puedes encontrar el desarrollo de muchos otros, tutoriales y más ideas en www.korthalsaltes.com .

Caleidociclo dodecagonal cerrado