© 2007 M. Tallman A Mental Math Strategy. © 2007 M. Tallman 96 + 268 + 4 - 4 100 264 + = 364 Step 1: 96 is close to 100; 100 is a much easier number to.

Slides:

Advertisements

Similar presentations

Advertisements

© 2007 M. Tallman. Find your number. Look right next door. 35 Step 1: Circle the digit in the place that you must round to. Step 2: Draw an arrow to the.

Estimate Sums and Differences.

© 2007 M. Tallman. Look right next door. 3. Find your number. 7 Round to the nearest one (units). 4 Step 1: Circle the digit in the place that you must.

Addition and Subtraction

© 2007 M. Tallman 125× = © 2007 M. Tallman (5 × 4) 85×= 40 45×= 20 5 × 12 = (5 × 8) + 125×= 60.

© 2007 M. Tallman. Find the mean of 7, 4, 5, Step 1: Add the numbers in the data set. Step 2: Divide the sum by the “number of numbers”

Mental Math Subtractions Additions

MENTAL MATH Adding Facts to = = =

MENTAL MATH General Review = 60 – 10 = =

© 2007 M. Tallman. - - Step 1: Divide (÷) Step 2: Multiply (×) Step 3: Subtract (-) Step 4: Bring Down ( ↓ ) Step 5: Repeat or Remainder ) 43 5 How many.

Adjusting numbers in a problem in a problem to make to make mental math easier easier.

Adding and Taking Away The Easy Way Mental Maths Learning Objectives I will be able to use a number of different mental strategies to add and subtract.

Big Idea There is more than algorithm for each of the operations with rational numbers. Most algorithms for operations with rational numbers use both mental.

© 2007 M. Tallman. Commutative Property © 2007 M. Tallman The order of the addends does not change the sum = addends sum =

1-5 Properties and Mental Math Learn to use number properties to compute mentally.

1-5 Properties and Mental Math I CAN use the commutative and associative properties to add and multiply whole numbers. I CAN use the distributive property.

Lesson 3: Properties of Addition and Multiplication Pages:

Click to edit Master text styles – Second level Third level – Fourth level » Fifth level Two Digit Addition and Subtraction Parent Quick Smarts :Grade.

Mental Maths Learning Objectives I will be able to use a number of different mental strategies to add and subtract.

Adding and Subtracting Decimals

Properties of Addition Day 1. Properties Today you are going to learn three properties of addition. Properties of addition are rules that you follow when.

© 2007 M. Tallman. 130, ,000 = 70,000 The following pattern of subtraction is related to a basic math fact: = =

MENTAL MATH Subtracting Tens and Compensate Strategy: When subtracting numbers ending in 7, 8, or 9, round that number to the nearest tens and then add.

Using Mental Math Subtraction. 2 This jacket costs $152. It is on sale for $17 off. Using mental math, how much will this jacket cost? $ $17 = ?

The properties of real numbers help us simplify math expressions and help us better understand the concepts of algebra.

© 2007 M. Tallman A Mental Math Strategy. © 2007 M. Tallman = 72 Step 1: 94 is close to 100; 100 is a much easier number to work.

© 2007 M. Tallman =

© 2007 M. Tallman. 40, ,000 = 70,000 The following pattern of addition is related to a basic math fact: = = = 700.

Properties: Addition and Subtraction Day 2

Lesson 10-1: Adding Groups of 10

Order of Operations and the Distributive Property COURSE 2 LESSON 1-9 Use the Distributive Property to find 7(52). What you think 52 is Finding.

MENTAL MATH PART III SUBTRACTION & THE LAST OF HWK #1.

© 2007 M. Tallman. Commutative Property © 2007 M. Tallman The order of the addends does not change the sum = addends sum =

Properties in Math. Commutative Property of addition Says that you can switch the addends around and still get the same sum. Ex: = Ex: 6 +

© 2007 M. Tallman. Find your number. Look right next door. 27 Step 1: Circle the digit in the place that you must round to. Step 2: Draw an arrow to the.

© 2007 M. Tallman. Addend- a number that is added to another. = addend.

More Number Patterns (Can you find the rule?). Mental Maths Learning Objectives To be able to add and subtract 9 and 10 rapidly.

Commutative Property of Addition Commutative Property of Multiplication For all real numbers a and b a + b = b + a For all real numbers a and b a b = b.

Using Mental Math Subtraction.

L 8: Mental Math: Subtracting

Math 801A: Mental Math - Subtraction Strategies

Knowing your math operation terms

Have a go… 2+5= 10-3= 15+6= 20-14= 26+34= 48+36= 98-45= =

Wilf: to begin to remember number bonds for 10

Topic 2: Add and Subtract Decimals to Hundredths

Properties of Numbers Use mental math to simplify –2 • 13 • 5.

Objectives Use the Commutative, Associative, and Distributive Properties to simplify expressions.

Grand SLAM First Grade Wk 14 Math CCA.

Addition Strategies 2nd Grade Parent Help.

Properties of Numbers Identify each property. a. 0 + x = x

Add or Subtract? x =.

Adding and Subtracting Decimals

Math Journal Notes Unit 3.

Objective - To add and subtract decimals.

Adding and Subtracting Decimals

Add and Subtract within 20 Mentally

Math Fu Subtraction Click to begin.

To view this slide show:

Objectives Use the Commutative, Associative, and Distributive Properties to simplify expressions.

Strand B- Number Sense Grade Three

Math Journal Notes Unit 4.

Adding 8 to a given addend

Adding 1 to a given addend __ + 1 =.

Mental Math Day 1.

1.3 Properties of Numbers.

To view this slide show:

Presentation transcript:

© 2007 M. Tallman A Mental Math Strategy

© 2007 M. Tallman = 364 Step 1: 96 is close to 100; 100 is a much easier number to work with. Step 2: Add 4 to 96 to make it 100. Step 3: Subtract 4 from the other addend, 268. Step 4: Add 100 and 264 mentally.

= 628 Step 1: 494 is close to 500; 500 is a much easier number to work with. Step 2: Add 6 to 494 to make it 500. Step 3: Subtract 6 from the other addend, 134. Step 4: Add 128 and 500 mentally.

= 302 Step 1: 185 is close to 200; 200 is a much easier number to work with. Step 2: Add 15 to 185 to make it 200. Step 3: Subtract 15 from the other addend, 117. Step 4: Add 200 and 102 mentally.

= 586 Step 1: 456 is close to 450; 450 is an easier number to work with. Step 2: Subtract 6 to 456 to make it 450. Step 3: Add 6 to the other addend, 130. Step 4: Add 450 and 136 mentally.

= 849 Step 1: 708 is close to 700; 700 is a much easier number to work with. Step 2: Subtract 8 from 708 to make it 700. Step 3: Add 8 to the other addend, 141. Step 4: Add 141 and 700 mentally.

A Mental Math Strategy

© 2007 M. Tallman

© 2007 M. Tallman