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Numbers & Operations in Base Ten
Operations & Algebraic Thinking
  • Use addition and subtraction within 100 to solve one- and two-step word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions.
  • Fluently add and subtract within 20 using mental strategies.
  • Determine whether a group of objects (up to 20) has an odd or even number of members.
  • Use addition to find the total number of objects arranged in rectangular arrays with up to 5 rows and up to 5 columns.
  • Understand that the three digits of a three-digit number represent amounts of hundreds, tens, and ones.
  • Count within 1000; skip-count by 5s, 10s, and 100s.
  • Read and write numbers to 1000 using base-ten numerals, number names, and expanded form.
  • Compare two three-digit numbers based on meanings of the hundreds, tens, and ones digits, using >, =, and < symbols to record the results of comparisons.
  • Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.
  • Add up to four two-digit numbers using strategies based on place value and properties of operations.
  • Add and subtract within 1000, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.
  • Mentally add 10 or 100 to a given number 100-900, and mentally subtract 10 or 100 from a given number 100-900.
  • Explain why addition and subtraction strategies work, using place value and the properties of operations.
  • Measure the length of an object by selecting and using appropriate tools such as rulers, yardsticks, meter sticks, and measuring tapes.
  • Measure the length of an object twice, using length units of different lengths for the two measurements; describe how the two measurements relate to the size of the unit chosen.
  • Estimate lengths using units of inches, feet, centimeters, and meters.
  • Measure to determine how much longer one object is than another, expressing the length difference in terms of a standard length unit.
  • Use addition and subtraction within 100 to solve word problems involving lengths that are given in the same units.
  • Represent whole numbers as lengths from 0 on a number line diagram with equally spaced points corresponding to the numbers 0, 1, 2, ..., and represent whole-number sums and differences within 100 on a number line diagram.
  • Tell and write time from analog and digital clocks to the nearest five minutes, using a.m. and p.m.
  • Solve word problems involving dollar bills, quarters, dimes, nickels, and pennies, using $ and ยข symbols appropriately.
  • Generate measurement data by measuring lengths of several objects to the nearest whole unit, or by making repeated measurements of the same object.
  • Solve simple put-together, take-apart, and compare problems using information presented in a bar graph.
  • Recognize shapes having specified attributes, such as a given number of angles or a given number of equal faces.
  • Partition a rectangle into rows and columns of same-size squares and count to find the total number of them.
  • Partition circles and rectangles into two, three, or four equal shares, describe the shares using the words halves, thirds, half of, a third of, etc.