Grade 1 · Geometry

CCSS.MATH.CONTENT.1.G.A.3

Partition circles and rectangles into two and four equal shares, describe the shares using the words halves, fourths, and quarters, and use the phrases half of, fourth of, and quarter of. Describe the whole as two of, or four of the shares. Understand for these examples that decomposing into more equal shares creates smaller shares.

Read this standard on the official Common Core site

Lessons that teach this standard

• Equal Shares: Halves, Thirds and Fourths

  Cut circles and rectangles into two, three or four equal shares, name them halves, thirds and fourths, and see why more shares means smaller shares. Grades 1–2.