Grade 1 Math (North Carolina SCOS)

Operations and Algebraic Thinking (OA)

• Represent and solve problems involving addition and subtraction
• NC.1.OA.1 Solve addition and subtraction word problems within 20 with unknowns in all positions.
• NC.1.OA.2 Solve word problems that add three whole numbers with a sum up to 20.
• Understand and apply properties of operations
• NC.1.OA.3 Use the commutative and associative properties as strategies for adding.
• NC.1.OA.4 Solve unknown-addend problems within 20 using addition strategies or subtraction.
• Add and subtract within 20
• NC.1.OA.6 Add and subtract within 20 using strategies such as counting on, making ten, and number lines.
• NC.1.OA.9 Add and subtract fluently within 10.
• Analyze addition and subtraction equations within 20
• NC.1.OA.7 Use the meaning of the equal sign to decide whether addition and subtraction equations are true.
• NC.1.OA.8 Find the unknown whole number in an addition or subtraction equation with three numbers.

Number and Operations in Base Ten (NBT)

• Extend and recognize patterns in the counting sequence
• NC.1.NBT.1 Count to 150 starting from any number below 150.
• NC.1.NBT.7 Read and write numerals to 100 and use them to represent quantities.
• Understand place value
• NC.1.NBT.2 Understand two-digit numbers as tens and ones, including teen numbers and multiples of ten.
• NC.1.NBT.3 Compare two-digit numbers using tens and ones and record with >, =, and <.
• Use place value understanding and properties of operations to add and subtract
• NC.1.NBT.4 Add within 100 using place value strategies with models or drawings, explaining reasoning.
• NC.1.NBT.5 Mentally find 10 more or 10 less than a two-digit number and explain how.
• NC.1.NBT.6 Subtract multiples of 10 in the range 10–90 and explain the reasoning.

Measurement and Data (MD)

• Measure lengths
• NC.1.MD.1 Order three objects by length and compare two lengths indirectly using a third object.
• NC.1.MD.2 Measure lengths with non-standard units laid end to end without gaps or overlaps.
• Build understanding of time and money
• NC.1.MD.3 Tell and write time in hours and half-hours on analog and digital clocks.
• NC.1.MD.5 Identify quarters, dimes, and nickels and relate their values to pennies.
• Represent and interpret data
• NC.1.MD.4 Organize, represent, and interpret data with up to three categories and answer comparison questions.

Geometry (G)

• Reason with shapes and their attributes
• NC.1.G.1 Tell defining from non-defining attributes and build shapes that have given defining attributes.
• NC.1.G.2 Create composite flat and solid shapes from simpler shapes and name their parts.
• NC.1.G.3 Partition circles and rectangles into two and four equal shares described as halves and fourths.