Missouri 1st Grade Math Standards

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1.NS Number Sense

• 1.NS.A Understand and use numbers up to 120.
  • 1.NS.A.1 Count to 120, starting at any number less than 120.
  • 1.NS.A.2 Read and write numerals and represent a number of objects with a written numeral.
  • 1.NS.A.3 Count backward from a given number between 20 and 1.
  • 1.NS.A.4 Count by 5s to 100 starting at any multiple of five.

1.NBT Number Sense and Operations in Base Ten

• 1.NBT.A Understand place value of two-digit numbers.
  • 1.NBT.A.1 Understand that 10 can be thought of as a bundle of 10 ones – called a “ten”.
  • 1.NBT.A.2 Understand two-digit numbers are composed of ten(s) and one(s).
  • 1.NBT.A.3 Compare two two-digit numbers using the symbols >, = or <.
  • 1.NBT.A.4 Count by 10s to 120 starting at any number.
• 1.NBT.B Use place value understanding to add and subtract.
  • 1.NBT.B.5 Add within 100.
  • 1.NBT.B.6 Calculate 10 more or 10 less than a given number mentally without having to count.
  • 1.NBT.B.7 Add or subtract a multiple of 10 from another two-digit number, and justify the solution.

1.RA Relationships and Algebraic Thinking

• 1.RA.A Represent and solve problems involving addition and subtraction.
  • 1.RA.A.1 Use addition and subtraction within 20 to solve problems.
  • 1.RA.A.2 Solve problems that call for addition of three whole numbers whose sum is within 20.
  • 1.RA.A.3 Develop the meaning of the equal sign and determine if equations involving addition and subtraction are true or false.
  • 1.RA.A.4 Determine the unknown whole number in an addition or subtraction equation relating three whole numbers.
• 1.RA.B Understand and apply properties of operations and the relationship between addition and subtraction.
  • 1.RA.B.5 Use properties as strategies to add and subtract.
  • 1.RA.B.6 Demonstrate that subtraction can be solved as an unknown-addend problem.
• 1.RA.C Add and subtract within 20.
  • 1.RA.C.7 Add and subtract within 20.
  • 1.RA.C.8 Demonstrate fluency with addition and subtraction within 10.

1.GM Geometry and Measurement

• 1.GM.A Reason with shapes and their attributes.
  • 1.GM.A.1 Distinguish between defining attributes versus non-defining attributes; build and draw shapes that possess defining attributes.
  • 1.GM.A.2 Compose and decompose two- and three-dimensional shapes to build an understanding of part-whole relationships and the properties of the original and composite shapes.
  • 1.GM.A.3 Recognize two- and three-dimensional shapes from different perspectives and orientations.
  • 1.GM.A.4 Partition circles and rectangles into two or four equal shares, and describe the shares and the wholes verbally.
• 1.GM.B Measure lengths in non-standard units.
  • 1.GM.B.5 Order three or more objects by length.
  • 1.GM.B.6 Compare the lengths of two objects indirectly by using a third object.
  • 1.GM.B.7 Demonstrate the ability to measure length or distance using objects.
• 1.GM.C Work with time and money.
  • 1.GM.C.8 Tell and write time in hours and half-hours using analog and digital clocks.
  • 1.GM.C.9 Know the value of a penny, nickel, dime and quarter.

1.DS Data and Statistics

• 1.DS.A Represent and interpret data.
  • 1.DS.A.1 Collect, organize and represent data with up to three categories.
  • 1.DS.A.2 Draw conclusions from object graphs, picture graphs, T-charts and tallies.