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FAMILY MATH Classify to Make Categories and Count

Part–Part–Total

LEARN ▸ Module 1 ▸

Counting and Cardinality

What does this painting have to do with math?

Piet Mondrian reduced his subjects to colorful geometric shapes. In this painting, bold, black horizontal and vertical lines frame the colorful squares and rectangles in red, black, yellow, and more. Do any of the shapes seem similar? Do you notice that the smaller shapes are added together to create bigger shapes? How many shapes do you see in total?

On the cover

Composition with Large Red Plane, Yellow, Black, Gray and Blue, 1921

Piet Mondrian, Dutch, 1872–1944

Oil on canvas

Kunstmuseum Den Haag, The Hague, Netherlands

Piet Mondrian (1872–1944), Composition with Large Red Plane, Yellow, Black, Gray and Blue, 1921. Oil on canvas. Kunstmuseum Den Haag, The Hague, Netherlands. Image copyright © Kunstmuseum

Den Haag. Image credit: Bridgeman Images

Topic B

Topic C

This lesson appears only in the Teach book.