Mental Math Addition Posters

  Common Core Curriculum alignment

• CCSS.MATH.CONTENT.1.OA.B.3

  Apply properties of operations as strategies to add and subtract.2 Examples: If 8 + 3 = 11 is known, then 3 + 8 = 11 is also known. (Commutative property of addition.) To add 2 + 6 + 4, the second two numbers can be added to make a ten, so 2 + 6 + 4 ...

  In Grade 1Standards for Mathematical PracticeOperations & Algebraic ThinkingUnderstand and apply properties of operations and the relationship between addition and subtraction
• CCSS.MATH.CONTENT.1.OA.C.5

  Relate counting to addition and subtraction (e.g., by counting on 2 to add 2).

  In Grade 1Standards for Mathematical PracticeOperations & Algebraic ThinkingAdd and subtract within 20
• CCSS.MATH.CONTENT.1.OA.C.6

  Add and subtract within 20, demonstrating fluency for addition and subtraction within 10. Use strategies such as counting on; making ten (e.g., 8 + 6 = 8 + 2 + 4 = 10 + 4 = 14); decomposing a number leading to a ten (e.g., 13 - 4 = 13 - 3 - 1 = 10 - ...

  In Grade 1Standards for Mathematical PracticeOperations & Algebraic ThinkingAdd and subtract within 20
• CCSS.MATH.CONTENT.1.NBT.C.4

  Add within 100, including adding a two-digit number and a one-digit number, and adding a two-digit number and a multiple of 10, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship b...

  In Grade 1Standards for Mathematical PracticeNumber & Operations in Base TenUse place value understanding and properties of operations to add and subtract
• CCSS.MATH.CONTENT.1.NBT.C.5

  Given a two-digit number, mentally find 10 more or 10 less than the number, without having to count; explain the reasoning used.

  In Grade 1Standards for Mathematical PracticeNumber & Operations in Base TenUse place value understanding and properties of operations to add and subtract
• CCSS.MATH.CONTENT.2.OA.B.2

  Fluently add and subtract within 20 using mental strategies. By end of Grade 2, know from memory all sums of two one-digit numbers.

  In Grade 2Standards for Mathematical PracticeOperations & Algebraic ThinkingAdd and subtract within 20
• CCSS.MATH.CONTENT.2.NBT.B.5

  Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.

  In Grade 2Standards for Mathematical PracticeNumber & Operations in Base TenUse place value understanding and properties of operations to add and subtract
• CCSS.MATH.CONTENT.2.NBT.B.6

  Add up to four two-digit numbers using strategies based on place value and properties of operations.

  In Grade 2Standards for Mathematical PracticeNumber & Operations in Base TenUse place value understanding and properties of operations to add and subtract
• CCSS.MATH.CONTENT.2.NBT.B.7

  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; relate the strategy to a written method. Understand that in addin...

  In Grade 2Standards for Mathematical PracticeNumber & Operations in Base TenUse place value understanding and properties of operations to add and subtract
• CCSS.MATH.CONTENT.2.NBT.B.8

  Mentally add 10 or 100 to a given number 100-900, and mentally subtract 10 or 100 from a given number 100-900.

  In Grade 2Standards for Mathematical PracticeNumber & Operations in Base TenUse place value understanding and properties of operations to add and subtract
• CCSS.MATH.CONTENT.2.NBT.B.9

  Explain why addition and subtraction strategies work, using place value and the properties of operations.

  In Grade 2Standards for Mathematical PracticeNumber & Operations in Base TenUse place value understanding and properties of operations to add and subtract
• CCSS.MATH.CONTENT.3.OA.D.8

  Solve two-step word problems using the four operations. Represent these problems using equations with a letter standing for the unknown quantity. Assess the reasonableness of answers using mental computation and estimation strategies including roundi...

  In Grade 3Standards for Mathematical PracticeOperations & Algebraic ThinkingSolve problems involving the four operations, and identify and explain patterns in arithmetic
• CCSS.MATH.CONTENT.3.NBT.A.2

  Fluently add and subtract within 1000 using strategies and algorithms based on place value, properties of operations, and/or the relationship between addition and subtraction.

  In Grade 3Standards for Mathematical PracticeNumber & Operations in Base TenUse place value understanding and properties of operations to perform multi-digit arithmetic
• CCSS.MATH.CONTENT.4.NBT.B.4

  Fluently add and subtract multi-digit whole numbers using the standard algorithm.

  In Grade 4Standards for Mathematical PracticeOperations in Base TenUse place value understanding and properties of operations to perform multi-digit arithmetic