Missouri 2nd Grade Math Standards

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2.NBT Number Sense and Operations in Base Ten

• 2.NBT.A Understand place value of three digit numbers.
  • 2.NBT.A.1 Understand three-digit numbers are composed of hundreds, tens and ones.
  • 2.NBT.A.2 Understand that 100 can be thought of as 10 tens – called a “hundred”.
  • 2.NBT.A.3 Count within 1000 by 1s, 10s and 100s starting with any number.
  • 2.NBT.A.4 Read and write numbers to 1000 using number names, base-ten numerals and expanded form.
  • 2.NBT.A.5 Compare two three-digit numbers using the symbols >, = or <.
• 2.NBT.B Use place value understanding and properties of operations to add and subtract.
  • 2.NBT.B.6 Demonstrate fluency with addition and subtraction within 100.
  • 2.NBT.B.7 Add up to four two-digit numbers.
  • 2.NBT.B.8 Add or subtract within 1000, and justify the solution.
  • 2.NBT.B.9 Use the relationship between addition and subtraction to solve problems.
  • 2.NBT.B.10 Add or subtract mentally 10 or 100 to or from a given number within 1000.
• 2.NBT.C Represent and solve problems involving addition and subtraction.
  • 2.NBT.C.11 Write and solve problems involving addition and subtraction within 100.

2.RA Relationships and Algebraic Thinking

• 2.RA.A Add and subtract within 20.
  • 2.RA.A.1 Demonstrate fluency with addition and subtraction within 20.
• 2.RA.B Develop foundations for multiplication and division.
  • 2.RA.B.2 Determine if a set of objects has an odd or even number of members.
    • 2.RA.B.2.a Count by 2s to 100 starting with any even number.
    • 2.RA.B.2.b Express even numbers as pairings/groups of 2, and write an expression to represent the number using addends of 2.
    • 2.RA.B.2.c Express even numbers as being composed of equal groups and write an expression to represent the number with 2 equal addends.
  • 2.RA.B.3 Find the total number of objects arranged in a rectangular array with up to 5 rows and 5 columns, and write an equation to represent the total as a sum of equal addends.

2.GM Geometry and Measurement

• 2.GM.A Reason with shapes and their attributes.
  • 2.GM.A.1 Recognize and draw shapes having specified attributes, such as a given number of angles or sides.
    • 2.GM.A.1.a Identify triangles, quadrilaterals, pentagons, hexagons, circles and cubes.
    • 2.GM.A.1.b Identify the faces of three-dimensional objects.
  • 2.GM.A.2 Partition a rectangle into rows and columns of same-size squares and count to find the total number of squares.
  • 2.GM.A.3 Partition circles and rectangles into two, three or four equal shares, and describe the shares and the whole.
    • 2.GM.A.3.a Demonstrate that equal shares of identical wholes need not have the same shape.
• 2.GM.B Measure and estimate lengths in standard units.
  • 2.GM.B.4 Measure the length of an object by selecting and using appropriate tools.
  • 2.GM.B.5 Analyze the results of measuring the same object with different units.
  • 2.GM.B.6 Estimate lengths using units of inches, feet, yards, centimeters and meters.
  • 2.GM.B.7 Measure to determine how much longer one object is than another.
• 2.GM.C Relate addition and subtraction to length.
  • 2.GM.C.8 Use addition and subtraction within 100 to solve problems involving lengths that are given in the same units.
  • 2.GM.C.9 Represent whole numbers as lengths on a number line, and represent whole-number sums and differences within 100 on a number line.
• 2.GM.D Work with time and money.
  • 2.GM.D.10 Tell and write time from analog and digital clocks to the nearest five minutes, using a.m. and p.m.
  • 2.GM.D.11 Describe a time shown on a digital clock as representing hours and minutes, and relate a time shown on a digital clock to the same time on an analog clock.
  • 2.GM.D.12 Find the value of combinations of dollar bills, quarters, dimes, nickels and pennies, using $ and ¢ appropriately.
  • 2.GM.D.13 Find combinations of coins that equal a given amount.

2.DS Data and Statistics

• 2.DS.A Represent and interpret data.
  • 2.DS.A.1 Create a line plot to represent a set of numeric data, given a horizontal scale marked in whole numbers.
  • 2.DS.A.2 Generate measurement data to the nearest whole unit, and display the data in a line plot.
  • 2.DS.A.3 Draw a picture graph or a bar graph to represent a data set with up to four categories.
  • 2.DS.A.4 Solve problems using information presented in line plots, picture graphs and bar graphs.
  • 2.DS.A.5 Draw conclusions from line plots, picture graphs and bar graphs.