Teaching Resource

Mental Math Addition Posters

In Mathematics Operations Addition Fact Strategies

PDF | 9 pages|Grades: 1 - 5

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9 posters outlining mental math strategies for addition.

Strategies include:

Counting on
Round or adjust
Use a known fact
Use Doubles
Add the parts
Use place value
Make a ten
Use compatible pairs

Print these posters and display them in your classroom as a reference for students.

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Common Core

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 1 Standards for Mathematical Practice Operations & Algebraic Thinking Understand 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 1 Standards for Mathematical Practice Operations & Algebraic Thinking Add 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 1 Standards for Mathematical Practice Operations & Algebraic Thinking Add 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 1 Standards for Mathematical Practice Number & Operations in Base Ten Use 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 1 Standards for Mathematical Practice Number & Operations in Base Ten Use 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 2 Standards for Mathematical Practice Operations & Algebraic Thinking Add 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 2 Standards for Mathematical Practice Number & Operations in Base Ten Use 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 2 Standards for Mathematical Practice Number & Operations in Base Ten Use 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 2 Standards for Mathematical Practice Number & Operations in Base Ten Use 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 2 Standards for Mathematical Practice Number & Operations in Base Ten Use 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 2 Standards for Mathematical Practice Number & Operations in Base Ten Use 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 3 Standards for Mathematical Practice Operations & Algebraic Thinking Solve 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 3 Standards for Mathematical Practice Number & Operations in Base Ten Use 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 4 Standards for Mathematical Practice Operations in Base Ten Use place value understanding and properties of operations to perform multi-digit arithmetic

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