1 of 29

What's hot

Fractions comparing ordering
Fractions comparing orderingangelwatler

One Step Word Problem on Addition
One Step Word Problem on AdditionJohdener14

5. lesson 4 subtraction of whole numbers
5. lesson 4 subtraction of whole numbersJohn Rome Aranas

Multiplying 2 to 3 multiplicand by 2-digit multiplier
Multiplying 2 to 3 multiplicand by 2-digit multiplierhaighdz27

SUBTRACTION WITH REGROUPING
SUBTRACTION WITH REGROUPINGJohdener14

SUBTRACTION WITHOUT REGROUPING
SUBTRACTION WITHOUT REGROUPINGJohdener14

Ordering numbers powerpoint
Ordering numbers powerpointJoe Scully

Dividing decimals by whole numbers
Dividing decimals by whole numbersKristaEvans1024

Math primary 3 numbers up to 10 000
Math primary 3 numbers up to 10 000Budhi Nugroho

multiplication tables
multiplication tablesGraceMetz

6. lesson 5 multiplication of whole numbers
6. lesson 5 multiplication of whole numbersJohn Rome Aranas

Subtraction with regrouping
Subtraction with regroupingKattStubbs

Rounding Numbers (Math 4)
Rounding Numbers (Math 4)menchreo

What's hot(20)

Fractions comparing ordering
Fractions comparing ordering

One Step Word Problem on Addition
One Step Word Problem on Addition

Least common multiple
Least common multiple

5. lesson 4 subtraction of whole numbers
5. lesson 4 subtraction of whole numbers

Multiplying 2 to 3 multiplicand by 2-digit multiplier
Multiplying 2 to 3 multiplicand by 2-digit multiplier

SUBTRACTION WITH REGROUPING
SUBTRACTION WITH REGROUPING

SUBTRACTION WITHOUT REGROUPING
SUBTRACTION WITHOUT REGROUPING

Ordering numbers powerpoint
Ordering numbers powerpoint

Multiples
Multiples

Dividing decimals by whole numbers
Dividing decimals by whole numbers

Math primary 3 numbers up to 10 000
Math primary 3 numbers up to 10 000

Comparing numbers up to 1000
Comparing numbers up to 1000

Comparing fractions
Comparing fractions

multiplication tables
multiplication tables

6. lesson 5 multiplication of whole numbers
6. lesson 5 multiplication of whole numbers

Subtraction with regrouping
Subtraction with regrouping

Rounding Numbers (Math 4)
Rounding Numbers (Math 4)

Viewers also liked

Edukasyon sa Pagpapakatao
Edukasyon sa PagpapakataoKim Haze Rasca

EDUKASYON SA PAGPAPAKATAO 2 l7
EDUKASYON SA PAGPAPAKATAO 2 l7Sherill Dueza

6-1 Mental Math: Multiplying Decimals by 10, 100, 1000
6-1 Mental Math: Multiplying Decimals by 10, 100, 1000Rudy Alfonso

Multiplication jeopardy game
Multiplication jeopardy gamerryan80

Comparing fractions and decimals
Comparing fractions and decimalsg2desai

Multiplication arrays ppt
Multiplication arrays pptrryan80

Decimals guide
Decimals guideSmithnz

Mathematics
Mathematicsskku_npc

Natural and artificial light
Natural and artificial lightSLIDE TEACHER

4-5 Mental Math: Multiplication Patterns: Using 10, 100, 1000
4-5 Mental Math: Multiplication Patterns: Using 10, 100, 1000Rudy Alfonso

Strategic intervention material
Strategic intervention materialRodtips

Learning multiplication

Strategic Intervention Materials
Strategic Intervention MaterialsBrian Mary

Multiplication Powerpoint
Multiplication PowerpointMandie Funk

Grade 3 Arts Teachers GuideLance Razon

Writer's Notebook Explained
Writer's Notebook Explainedmslesliegordon

Viewers also liked(20)

Edukasyon sa Pagpapakatao
Edukasyon sa Pagpapakatao

EDUKASYON SA PAGPAPAKATAO 2 l7
EDUKASYON SA PAGPAPAKATAO 2 l7

6-1 Mental Math: Multiplying Decimals by 10, 100, 1000
6-1 Mental Math: Multiplying Decimals by 10, 100, 1000

Multiplication jeopardy game
Multiplication jeopardy game

Comparing fractions and decimals
Comparing fractions and decimals

Multiplication arrays ppt
Multiplication arrays ppt

Decimals guide
Decimals guide

Mathematics
Mathematics

10 Ridiculous Hacks to 5X Click-Through Rates
10 Ridiculous Hacks to 5X Click-Through Rates

Natural and artificial light
Natural and artificial light

4-5 Mental Math: Multiplication Patterns: Using 10, 100, 1000
4-5 Mental Math: Multiplication Patterns: Using 10, 100, 1000

source of light
source of light

Strategic intervention material
Strategic intervention material

Learning multiplication
Learning multiplication

Strategic Intervention Materials
Strategic Intervention Materials

Multiplication Powerpoint
Multiplication Powerpoint

Writer's Notebook Explained
Writer's Notebook Explained

Similar to Mental Math Strategies for Grade 3

Mental Math Works
Mental Math WorksLS13527

Powerpoint
Powerpointsteph348

Powerpoint
Powerpointsteph348

An introduction to addition final version

Tricky math shortcut
Tricky math shortcutAbhi world

Edt 365 something to teach
Edt 365 something to teachHDH128

Math orientation, place value, estimation, rounding, basic ops word problems
Math orientation, place value, estimation, rounding, basic ops word problemsmathn3rd

Math journal chapters 1 3
Math journal chapters 1 3Ernie777

playing with numbers class 8
playing with numbers class 8 HimakshiKava

10 ways to do fast math
10 ways to do fast mathnazeer08cs79

Negative numbers adding and subtractingTerry Golden

Amazing Math Trick
Amazing Math TrickN8 G

Similar to Mental Math Strategies for Grade 3(20)

Mental Math Works
Mental Math Works

Mental math
Mental math

decimals. .pptx
decimals. .pptx

Math tricks
Math tricks

Powerpoint
Powerpoint

Powerpoint
Powerpoint

Decimal
Decimal

An introduction to addition final version
An introduction to addition final version

Tricky math shortcut
Tricky math shortcut

Decimals
Decimals

Edt 365 something to teach
Edt 365 something to teach

30 Simple Algebra Tricks for Students
30 Simple Algebra Tricks for Students

Math orientation, place value, estimation, rounding, basic ops word problems
Math orientation, place value, estimation, rounding, basic ops word problems

Math journal chapters 1 3
Math journal chapters 1 3

playing with numbers class 8
playing with numbers class 8

Amazing Maths Trick
Amazing Maths Trick

10 ways to do fast math
10 ways to do fast math

Amazing Math Trick
Amazing Math Trick

How to Manage Buy 3 Get 1 Free in Odoo 17
How to Manage Buy 3 Get 1 Free in Odoo 17Celine George

Indexing Structures in Database Management system.pdf
Indexing Structures in Database Management system.pdfChristalin Nelson

ESP 4-EDITED.pdfmmcncncncmcmmnmnmncnmncmnnjvnnv
ESP 4-EDITED.pdfmmcncncncmcmmnmnmncnmncmnnjvnnvRicaMaeCastro1

31 ĐỀ THI THỬ VÀO LỚP 10 - TIẾNG ANH - FORM MỚI 2025 - 40 CÂU HỎI - BÙI VĂN V...
31 ĐỀ THI THỬ VÀO LỚP 10 - TIẾNG ANH - FORM MỚI 2025 - 40 CÂU HỎI - BÙI VĂN V...Nguyen Thanh Tu Collection

4.11.24 Poverty and Inequality in America.pptx
4.11.24 Poverty and Inequality in America.pptxmary850239

BIOCHEMISTRY-CARBOHYDRATE METABOLISM CHAPTER 2.pptx
BIOCHEMISTRY-CARBOHYDRATE METABOLISM CHAPTER 2.pptxSayali Powar

ICS 2208 Lecture Slide Notes for Topic 6
ICS 2208 Lecture Slide Notes for Topic 6Vanessa Camilleri

An Overview of the Calendar App in Odoo 17 ERP
An Overview of the Calendar App in Odoo 17 ERPCeline George

Mythology Quiz-4th April 2024, Quiz Club NITW
Mythology Quiz-4th April 2024, Quiz Club NITWQuiz Club NITW

ClimART Action | eTwinning Project
ClimART Action | eTwinning Projectjordimapav

CLASSIFICATION OF ANTI - CANCER DRUGS.pptx
CLASSIFICATION OF ANTI - CANCER DRUGS.pptxAnupam32727

Q-Factor HISPOL Quiz-6th April 2024, Quiz Club NITW
Q-Factor HISPOL Quiz-6th April 2024, Quiz Club NITWQuiz Club NITW

MS4 level being good citizen -imperative- (1) (1).pdf
MS4 level being good citizen -imperative- (1) (1).pdfMr Bounab Samir

Tree View Decoration Attribute in the Odoo 17
Tree View Decoration Attribute in the Odoo 17Celine George

BÀI TẬP BỔ TRỢ TIẾNG ANH 11 THEO ĐƠN VỊ BÀI HỌC - CẢ NĂM - CÓ FILE NGHE (GLOB...
BÀI TẬP BỔ TRỢ TIẾNG ANH 11 THEO ĐƠN VỊ BÀI HỌC - CẢ NĂM - CÓ FILE NGHE (GLOB...Nguyen Thanh Tu Collection

Sulphonamides, mechanisms and their uses
Sulphonamides, mechanisms and their usesVijayaLaxmi84

How to Uninstall a Module in Odoo 17 Using Command Line
How to Uninstall a Module in Odoo 17 Using Command LineCeline George

Employablity presentation and Future Career Plan.pptx
Employablity presentation and Future Career Plan.pptxryandux83rd

How to Manage Buy 3 Get 1 Free in Odoo 17
How to Manage Buy 3 Get 1 Free in Odoo 17

Indexing Structures in Database Management system.pdf
Indexing Structures in Database Management system.pdf

ESP 4-EDITED.pdfmmcncncncmcmmnmnmncnmncmnnjvnnv
ESP 4-EDITED.pdfmmcncncncmcmmnmnmncnmncmnnjvnnv

31 ĐỀ THI THỬ VÀO LỚP 10 - TIẾNG ANH - FORM MỚI 2025 - 40 CÂU HỎI - BÙI VĂN V...
31 ĐỀ THI THỬ VÀO LỚP 10 - TIẾNG ANH - FORM MỚI 2025 - 40 CÂU HỎI - BÙI VĂN V...

4.11.24 Poverty and Inequality in America.pptx
4.11.24 Poverty and Inequality in America.pptx

BIOCHEMISTRY-CARBOHYDRATE METABOLISM CHAPTER 2.pptx
BIOCHEMISTRY-CARBOHYDRATE METABOLISM CHAPTER 2.pptx

ICS 2208 Lecture Slide Notes for Topic 6
ICS 2208 Lecture Slide Notes for Topic 6

An Overview of the Calendar App in Odoo 17 ERP
An Overview of the Calendar App in Odoo 17 ERP

Mythology Quiz-4th April 2024, Quiz Club NITW
Mythology Quiz-4th April 2024, Quiz Club NITW

ClimART Action | eTwinning Project
ClimART Action | eTwinning Project

CLASSIFICATION OF ANTI - CANCER DRUGS.pptx
CLASSIFICATION OF ANTI - CANCER DRUGS.pptx

Q-Factor HISPOL Quiz-6th April 2024, Quiz Club NITW
Q-Factor HISPOL Quiz-6th April 2024, Quiz Club NITW

MS4 level being good citizen -imperative- (1) (1).pdf
MS4 level being good citizen -imperative- (1) (1).pdf

Tree View Decoration Attribute in the Odoo 17
Tree View Decoration Attribute in the Odoo 17

BÀI TẬP BỔ TRỢ TIẾNG ANH 11 THEO ĐƠN VỊ BÀI HỌC - CẢ NĂM - CÓ FILE NGHE (GLOB...
BÀI TẬP BỔ TRỢ TIẾNG ANH 11 THEO ĐƠN VỊ BÀI HỌC - CẢ NĂM - CÓ FILE NGHE (GLOB...

Sulphonamides, mechanisms and their uses
Sulphonamides, mechanisms and their uses

How to Uninstall a Module in Odoo 17 Using Command Line
How to Uninstall a Module in Odoo 17 Using Command Line

Employablity presentation and Future Career Plan.pptx
Employablity presentation and Future Career Plan.pptx

Mental Math Strategies for Grade 3

• 1. Mental Math Strategies for Grade 3 Students All photos Courtesy of MS Clip Art Roshel Salvador
• 2. What is Mental Math??
• 3. It’s the ability to solve math equations in your head….
• 4. WITHOUT using paper OR a pencil!
• 5. With Mental Math you can manipulate (change) your number to make an easier equation. What’s an equation??? It’s the number sentence.
• 6. Here are a few Mental Math strategies: • Count on • Doubles • Near Doubles • Make a Friendly Number • Front-End Adding or Expanded Notation
• 7. Count On: If one of the numbers being added is a small number, then just count on.
• 8. Count On: 7+3= 3 is a small number, so just count on to get your answer.
• 9. Count On: RULE: Usually, if one of the numbers are from 1 to 5, you can just count on.
• 11. Doubles: Doubles are when you take a number and add it to itself. Eg. 2+2= 9+9= 15+15= 25+25= You double the number.
• 12. Near Doubles: Knowing your doubles helps with the Near Doubles strategy
• 13. Near Doubles: Near Doubles almost looks like a double, but it is off by 1,2,3 or 4 Near Double 2 + 2+1 Doubles Doubles
• 14. Near Doubles: Examples of other near doubles: 11+13= 5+8= 11 + 11+2= 5 + 5+3
• 15. Near Doubles: You can even use subtraction for near doubles. 11+13= 5+8= 13-2 + 13 8-3 + 8 8+8 - 3 13+13 - 2
• 16. Make a Friendly Number: What is a friendly number???
• 17. Make a Friendly Number: A friendly number is a number that ends with a “0”. Numbers with a “0” in the ones spot are easier to add with
• 18. Make a Friendly Number: For example, to make 28 a friendly number, I can add 2 to it to make it 30
• 19. Make a Friendly Number: More examples: • Add 5 to 35, to make 40 • Subtract 2 from 22 to make 20
• 20. Make a Friendly Number: This is how it helps: 9 + 4= If I make 9 into a 10, 10 + 3= it is easier to solve because I’m working with a friendly number.
• 21. Make a Friendly Number: BUT…. Notice how I changed the equation to 10 + 3, NOT 10 + 4 I had to manipulate the equation. Otherwise, I’m just make a new and different equation that won’t give the same answer
• 22. Make a Friendly Number: In adding, it is called “give and take”. If you give to one side, you have to take from the other side. 9 + 4= 13 (give 1) +1 -1 (take 1) 10 + 3= 13 New equation
• 23. Make a Friendly Number: In subtracting, it is called “give/give” or “take/take”. If you give to one side, you have to give to the other side. If you take from one side, you have to take from the other side.
• 24. Make a Friendly Number: Some examples of “give/give” and “take/take”: 9 – 4= 5 (give 1) +1 +1 (give 1) 10 – 5= 5 New equation 11 – 4= 7 (take 1) -1 -1 (take 1) 10 – 3= 7 New equation
• 25. Make a Friendly Number: When you: • “give & take” adding • “give/give”  subtracting • “take/take”  subtracting You are compensating!