Subtracting Friendly Numbers by Grade 4. are numbers that have 9’s in the Ones like 39 or 59 Tens like 199 or 399 Hundreds like 3999 or 6999.

Slides:

Advertisements

Similar presentations

Adding Friendly Numbers Grade 4. are numbers that have 0’s in the Tens like 30 or 50 Hundreds like 100 or 300 Thousands like 3000 or 6000.

Advertisements

Whole Numbers How do we use whole numbers to solve real-life problems?

How to add/subtract positive and negative numbers.

Math Rounding By Grade 4.

Multiplication with Base 10 Pieces Modeling Multiplication With your Base Ten blocks, model the problem: 3 x 5 Let’s see the example below… How.

Partial Sums An Addition Algorithm Add the hundreds ( ) Add the tens (60 +80) 140 Add the ones (8 + 3) Add the place value sums.

3 Digit Subtraction Math - 2 nd Grade Miss Olivia Fulton.

Subtraction of Real Numbers Section Rule: To subtract ADD the OPPOSITE. This sounds easy. Think about a problem 3 – 6. The operation in this problem.

Unit 7 Exponents and Negative Numbers Grade Exponential Notation  Complete the Math Message problem at the top of journal page 209.

Jeopardy Reduce Fraction Division Q $100 Q $200 Q $300 Q $400 Q $500 Q $100 Q $200 Q $300 Q $400 Q $500 Final Jeopardy What’s the rule? Place Value Multiply.

$100 $200 $300 $400 $100 $200 $300 $400 $300 $200 $100 Estimate with pictures Round to nearest hundred Round to nearest thousand Add / subtract & estimate.

Factoring Rules. Binomial Look for the greatest common factor Look for a difference of squares. –This means that the two terms of the binomial are perfect.

Fun with Place Value Forms of Numbers Comparing and Ordering Numbers Number Patterns Make.

Step-Book With Professor Assessor ©

ROUNDING and ESTIMATING NUMBERS

Module 3 Lesson 1.

8.4 Scientific Notation Scientific notation is used to write very large and very small numbers in powers of 10.

Set Sail Worktext p. 133.

? 1 ten = 10 ones 1 ten How many ten?

Where do we start? Top right 4 ones minus 7 ones Can’t do it! Take one ten away Tens place 2 Where do we get more ones? 1 ten + 4 ones = 14 ones.

Subtraction Counting Down Draw then number line

Today we will be learning: to count on in ones or tens to count back in ones or tens to split two-digit numbers into tens and units to make them easier.

4th Grade Spring Intensification

LO: to round to the nearest 10 Which ten is the following number nearest to?

Zim had 19 marbles. He gave 6 marbles to his friend Lilly. How many do I have left?

Addition and Subtraction 29 Addition and Subtraction Algorithms 2 ones plus 9 ones equal 11 ones. 11 is 1 ten and 1 one. Record the 1 one in the ones column.

8 ones plus 8 ones equal 16 ones. 16 is 1 ten and 6 ones. Record the 6 ones in the ones column between the equals sign. Because we have more tens, we.

Ms. Miles & Ms. Connelly Subtraction With Regrouping.

Math Chapter 10 2-Digit Subtraction. Regroup if you need to

36 LO: to round to the nearest 10

4,135,652 Place Value Hundred Thousands Ten Thousands Hundreds

Place Value Through the Millions I © 2007 M. Tallman.

Objective - To round whole numbers.

X 10 thousands hundreds tens ones Place Value 18.

Shapes Time Equations Place Value $10 $20 $30 $40 COMMON CORE.

? 1 ten 1 ten = 10 ones How many ten?

ADDITION and SUBTRACTION

& dding ubtracting ractions.

Reading Large Numbers & Identifying Place Value

L l l l l l l l l l l 783.

Comparing Numbers.

Place Value © Ashley Lee, 2013.

Relationship of Numbers in the Place Value System

Addition Children build the number sentence using concrete equipment.

Doubles and Halves Lets learn all about it.

Wilf: to begin to remember number bonds for 10

4,135,652 Place Value Hundred Thousands Ten Thousands Hundreds

L l l l l l l l l l l 42,783.

Adding Greater Numbers

Unit 2. Day 8..

Expanded Notation , , , , , , Name: _________________________________

Add or Subtract? x =.

Hundred Dollar Questions

Explain what just happened as completely as possible! There will be a

Three Digit Subtraction

Addition Grade 4.

Objective - To read, write and identify the values of whole numbers.

Divisibility 4,8 and 11.

Hundred Dollar Questions

Multiplication with Base 10 Pieces

Adding and Subtracting

How to do Subtraction with Regrouping

Comparing Numbers.

& dding ubtracting ractions.

Using Addition Properties

To view this slide show:

Presentation transcript:

Subtracting Friendly Numbers by Grade 4

are numbers that have 9’s in the Ones like 39 or 59 Tens like 199 or 399 Hundreds like 3999 or 6999

We can change numbers into so that they are easier to subtract in our heads! Follow this simple rule: You can change numbers if they: Are close to a ten, hundred or thousand

=299 (a friendly number) = to become 291 Now subtract

=199 (a friendly number) becomes 141 Now subtract

= 499 (a friendly number) becomes 376 Now subtract

= = 300 Now subtract

= = 300 Now subtract!

Subtract 8 = 823 Subtract 8 = 500 Now subtract!

Minus 1 to become 1999 Minus 1 to become 200 Now subtract!

Add 2 to become 807 Add 2 to become 600 Now subtract!

4000 Subtract 1to become 3999 Subtract 1 to become 2494 Now subtract!

The End – now do your own in your scribbler on the next slide! Check them when you’re done all of them.

Now do these on your own paper: ( =201) ( =2787) ( =1877) ( =1470) Did you find the mistake?