Distinguish between defining attributes (e.g., triangles are closed and three-sided) versus non-defining attributes (e.g., color, orientation, overall size); build and draw shapes to possess defining attributes.

Download and print 1.G.A.1 worksheets to help kids develop this key first grade Common Core math skill.

These printable 1st grade math worksheets help students master basic math skills. The initial focus is on numbers and counting followed by arithmetic and concepts related to fractions, time, money, measurement and geometry.

Common core worksheets and activities for 1.G.1 / Geometry / Reason With Shapes And Their Attributes. / Distinguish between defining attributes (e.g., triangles are closed and three-sided) versus non-defining attributes (e.g., color, orientation, overall size); build and draw shapes to possess defining attributes.

Check out our 1.G.A.1 lesson plans designed to help kids develop this key first grade Common Core math skill.

Find first grade math worksheets and other learning materials for the Common Core State Standards.

About 1.G.A.2 Compose two-dimensional shapes (rectangles, squares, trapezoids, triangles, half-circles, and quarter-circles) or three-dimensional shapes (cubes, right rectangular prisms, right circular cones, and right circular cylinders) to create a composite shape, and compose new shapes from the composite shape.

1) Lessons - The lesson for particular Chapter. All items must be completed for the each unit. 2) Solutions, answers and video answers for past homework and assignments.

Common core worksheets and activities for 1.G.3 / Geometry / Reason With Shapes And Their Attributes. / Partition circles and rectangles into two and four equal shares, describe the shares using the words halves, fourths, and quarters, and use …

本課件幫助學生練習分數的四則運算（只限於兩個真分數或整數的加減乘除）。 本課件幫助學生理解3的整除性判別方法。 相同方法亦適用於判別9的整除性。 在第二學習階段，學生已認識2、3、5和10的整除性判別方法。 在第三學習階段，學生須認識4、6、8和9的整除性判別方法。 本課件幫助教師作綜合評估。 本課件幫助學理解乘方是某數自乘若干次的運算過程。 本課件幫助學生認識質數是只有兩個因數的正整數。 本課件幫助學生認識以短除法將正整數分解為質因數的乘積。