Represent and solve problems involving addition and subtraction.
Add and subtract within 20.
Work with addition and subtraction equations.
Use place value understanding and properties of operations to add
and subtract.
Reason with shapes and their attributes.
Subtract multiples of 10 in the range 10-90, explaining the reasoning, using: Concrete models and drawings, Number lines, Strategies based on place value
Distinguish between defining and non-defining attributes and create appropriate shapes using 2-D drawings and by building 3-D shapes (2-D triangle, rectangle, square, trapezoid, hexagon, and circle) (3-D cube, prisms, cone, sphere, and cylinder)