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Distinguish between defining attributes versus non-defining attributes; build and draw shapes to possess defining attributes.
Solve word problems that call for addition of three whole numbers whose sum is less than or equal to 20, by using objects, drawings and equations with a symbol for one unknown number to represent the problem.
Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart and comparing, with unknowns in all positions.
Apply properties of operations as strategies to add and subtract.
Given a two-digit number, mentally find 10 more or 10 less than the number, without having to count; explain the reasoning used.
Compose shapes. a. Compose two-dimensional shapes to create rectangles, squares, trapezoids, triangles, half-circles and quarter-circles composite shape and compose new shapes from the composite shapes. b. Use 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 shapes.
Education Galaxy’s K-PREP mastery program provides online assessment and practice for students in Grades K-6 to help build mastery towards the Kentucky Core Academic Standards. Our unique online program is easy to use and enjoyable for both teachers and students. Students work on their Study Plans practicing important concepts while teachers pull formative assessment reports to identify the strengths and weaknesses of their classroom and individual students.