
Math Units
Unit 1: Building a Mathematical Community While Working with Numbers Within 20
NC.2.MD.6
Represent whole numbers as lengths from 0 on a number line diagram with equally spaced points and represent wholenumber sums and differences, within 100 (only up to 20 at this point), on a number line diagram.
NC.2.OA.2
Demonstrate fluency with addition and subtraction, within 20, using mental strategies.
NC.2.OA.3
Determine whether a group of objects, within 20, has an odd or even number of members by:
 Pairing objects, then counting them by 2s.
 Determining whether objects can be placed into two equal groups.
 Writing an equation to express an even number as a sum of two equal addends
Unit 2: Adding and Subtracting within 100
NC.2.OA.1
Represent and solve addition and subtraction word problems, within 100, with unknowns in all positions, by using representations and equations with a symbol for the unknown number to represent the problem, when solving:
 OneStep problems:
 Add to/Take from  Start Unknown
 Compare  Bigger Unknown
 Compare  Smaller Unknown
NC.2.NBT.2
Skipcount by 5s, 10s, and 100s.
NC.2.NBT.5
Demonstrate fluency with addition and subtraction, within 100, by:
 Flexibly using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.
 Comparing addition and subtraction strategies and explaining why they work.
 Selecting an appropriate strategy in order to efficiently compute sums and differences.
NC.2.NBT.6
Add up to three twodigit numbers using strategies based on place value and properties of operations.
NC.2.NBT.8
Mentally add 10 to a given number 100, and mentally subtract 10 from a given number 100.
NC.2.MD.6
Represent whole numbers as lengths from 0 on a number line diagram with equally spaced points and represent wholenumber sums and differences, within 100, on a number line.
Unit 3: Skip Counting in Multiple Context
NC.2.OA.4
Use addition to find the total number of objects arranged in rectangular arrays with up to 5 rows and up to 5 columns; write an equation to express the total as a sum of equal addends.
NC.2.MD.7
Tell and write time from analog and digital clocks to the nearest five minutes, using a.m. and p.m.
NC.2.NBT.2
Count within 1,000; skipcount by 5s, 10s.
Unit 4: Understanding Place Value to Read, Write and Compare Numbers
NC.2.NBT.1
Understand that the three digits of a threedigit number represent amounts of hundreds, tens, and ones.
 Unitize by making a hundred from a collection of ten tens.
 Demonstrate that the numbers 100, 200, 300, 400, 500, 600, 700, 800, 900 refer to one, two, three, four, five, six, seven, eight, or nine hundred, with 0 tens and 0 ones.
 Compose and decompose numbers using various groupings of hundreds, tens, and ones
NC.2.NBT.2
Count within 1,000; skipcount by 5s, 10s, and 100s.
NC.2.NBT.3
Read and write numbers, within 1,000, using baseten numerals, number names, and expanded form.
NC.2.NBT.4
Compare two threedigit numbers based on the value of the hundreds, tens, and ones digits, using >, =, and < symbols to record the results of comparisons.
Unit 5: Adding and Subtracting within 1,000
NC.2.NBT.6
Add up to three twodigit numbers using strategies based on place value and properties of operations
NC.2.NBT.7
Add and subtract, within 1,000, relating the strategy to a written method, using:
 Concrete models or drawings
 Strategies based on place value
 Properties of operations
 Relationship between addition and subtraction
NC.2.NBT.8
Mentally add 10 or 100 to a given number 100–900, and mentally subtract 10 or 100 from a given number 100–900.
NC.2.OA.1
Represent and solve addition and subtraction word problems, within 100, with unknowns in all positions, by using representations and equations with a symbol for the unknown number to represent the problem, when solving:
 OneStep problems:
 Add to/Take fromStart Unknown
 CompareBigger Unknown
 CompareSmaller Unknown
 TwoStep problems involving single digits:
 Add to/Take from Change Unknown
 Add to/Take From Result Unknown
Unit 6: Working with Linear Measurement
NC.2.MD.1
Measure the length of an object in standard units by selecting and using appropriate tools such as rulers, yardsticks, meter sticks, and measuring tapes.
NC.2.MD.2
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.
NC.2.MD.3
Estimate lengths in using standard units of inches, feet, yards, centimeters, and meters.
NC.2.MD.4
Measure to determine how much longer one object is than another, expressing the length difference in terms of a standardlength unit.
NC.2.MD.5
Use addition and subtraction, within 100, to solve word problems involving lengths that are given in the same units, using equations with a symbol for the unknown number to represent the problem.
NC.2.OA.1
Represent and solve addition and subtraction word problems, within 100, with unknowns in all positions, by using representations and equations with a symbol for the unknown number to represent the problem, when solving:
 OneStep problems:
 Add to/Take from  Start Unknown
 Compare  Bigger Unknown
 Compare  Smaller Unknown
 TwoStep problems involving single digits:
 Add to/Take from  Change Unknown
 Add to/Take From  Result Unknown
Unit 7: Data and Two Step Problem Solving
2.MD.10
Organize, represent, and interpret data with up to four categories.
 Draw a picture graph and a bar graph with a singleunit scale to represent a data set.
 Solve simple puttogether, takeapart, and compare problems using information presented in a picture and a bar graph.
2.OA.1
Represent and solve addition and subtraction word problems, within 100, with unknowns in all positions, by using representations and equations with a symbol for the unknown number to represent the problem, when solving:
 OneStep problems:
 Add to/Take from  Start Unknown
 Compare  Bigger Unknown
 Compare  Smaller Unknown
 TwoStep problems involving single digits:
 Add to/Take from  Change Unknown
 Add to/Take From  Result Unknown
Unit 8: Problem Solving with Money
NC.2.MD.8
Solve word problems involving:
 Quarters, dimes, nickels, and pennies within 99¢, using ¢ symbols appropriately.
 Whole dollar amounts, using the $ symbol appropriately
NC.2.OA.1
Represent and solve addition and subtraction word problems, within 100, with unknowns in all positions, by using representations and equations with a symbol for the unknown number to represent the problem, when solving:
 OneStep problems:
 Add to/Take fromStart Unknown
 CompareBigger Unknown
 CompareSmaller Unknown
 TwoStep problems involving single digits:
 Add to/ Take from Change Unknown
 Add to/Take From Result Unknown
Unit 9: Reasoning with Shapes
NC.2.G.1
Recognize and draw triangles, quadrilaterals, pentagons, and hexagons, having specified attributes; recognize and describe attributes of rectangular prisms and cubes.
NC.2.G.3
Partition circles and rectangles into two, three, or four equal shares.
 Describe the shares using the words halves, thirds, half of, a third of, fourths, fourth of, quarter of.
 Describe the whole as two halves, three thirds, four fourths.
 Explain that equal shares of identical wholes need not have the same shape.