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Geometry
Measurement & Data
Numbers & Operations in Base Ten
Operations & Algebraic Thinking
  • 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.
  • Solve word problems that call for addition of three whole numbers whose sum is less than or equal to 20.
  • Apply properties of operations as strategies to add and subtract.
  • Understand subtraction as an unknown-addend problem. For example, subtract 10 - 8 by finding the number that makes 10 when added to 8.
  • Relate counting to addition and subtraction.
  • Add and subtract within 20, demonstrating fluency for addition and subtraction within 10.
  • Understand the meaning of the equal sign, and determine if equations involving addition and subtraction are true or false.
  • Determine the unknown whole number in an addition or subtraction equation relating three whole numbers.
  • Count to 120, starting at any number less than 120. In this range, read and write numerals and represent a number of objects with a written numeral.
  • Understand that the two digits of a two-digit number represent amounts of tens and ones.
  • Compare two two-digit numbers based on meanings of the tens and ones digits, recording the results of comparisons with the symbols >, =, and <.
  • Add within 100, including adding a two-digit number and a one-digit number, and adding a two-digit number and a multiple of 10.
  • Given a two-digit number, mentally find 10 more or 10 less than the number, without having to count.
  • Subtract multiples of 10 in the range 10-90 from multiples of 10 in the range 10-90 (positive or zero differences).
  • Order three objects by length; compare the lengths of two objects indirectly by using a third object.
  • Express the length of an object as a whole number of length units, by laying multiple copies of a shorter object (the length unit) end to end.
  • Tell and write time in hours and half-hours using analog and digital clocks.
  • Organize, represent, and interpret data with up to three categories; ask and answer questions about the total number of data points, how many in each category, and how many more or less are in one category than in another.
  • Distinguish between defining attributes (e.g., triangles are closed and three-sided) versus non-defining attributes (e.g., color, orientation, overall size).
  • Compose two-dimensional shapes (rectangles, squares, trapezoids) or three-dimensional shapes (cubes, right rectangular prisms) to create a composite shape, and compose new shapes from the composite shape.
  • 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.

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