Teaching Resource

Mental Math Subtraction Posters

In Mathematics Operations Subtraction Fact Strategies

Free on Plus | 9 pages (PDF)|Grades: 1 - 5

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9 posters outlining mental math strategies for subtraction.

Strategies include:

Count back
Use a known fact
Count on
Use Doubles
Subtract the parts
Use place value
Use a ten
Round or adjust

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.4
Understand subtraction as an unknown-addend problem. For example, subtract 10 - 8 by finding the number that makes 10 when added to 8.
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.6
Subtract multiples of 10 in the range 10-90 from multiples of 10 in the range 10-90 (positive or zero differences), using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addit...
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.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.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.OA.A.2
Multiply or divide to solve word problems involving multiplicative comparison, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem, distinguishing multiplicative comparison from additive comparison.
In Grade 4 Standards for Mathematical Practice Operations & Algebraic Thinking Use the four operations with whole numbers to solve problems

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Mathematics Operations Subtraction Fact Strategies Posters Mental Math Math Strategies

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