estimation and rounding rounding two-digit numbers 26 1.underline the number in the place value you...

Upload: evan-brooks

Post on 23-Dec-2015

215 views

Category:

Documents

0 download

Report

Download

Embed Size (px):

TRANSCRIPT

ESTIMATION AND ROUNDING

Rounding two-digit numbers

1. Underline the number in the place value you will round.

2. Look at the number to the right of the underlined number.

Two-digit number will be rounded to the nearest ten.

3. If the number to the right is 0, 1, 2, 3, or 4, then the underlined number stays the same.

4. If the number to the right is 5, 6, 7, 8, or 9, then the underlined number needs to go up one more number.

RULES FOR ROUNDING

5. Every number to the right of the underlined number becomes a zero.

30So we can say that th closer to 30 than to 20.

Page 3: ESTIMATION AND ROUNDING Rounding two-digit numbers 26 1.Underline the number in the place value you will round. 2. Look at the number to the right of

Rounding three-digit numbers

520

1. Underline the number in the place value you will round.

2. Look at the number to the right of the underlined number.

Three-digit number will be rounded to the nearest hundred.

3. If the number to the right is 0, 1, 2, 3, or 4, then the underlined number stays the same.

4. If the number to the right is 5, 6, 7, 8, or 9, then the underlined number needs to go up one more number.

RULES FOR ROUNDING

5. Every number to the right of the underlined number becomes a zero.

50So we can say that the number 520 is closer to 500 than to 600.

Page 4: ESTIMATION AND ROUNDING Rounding two-digit numbers 26 1.Underline the number in the place value you will round. 2. Look at the number to the right of

20 26 30

26 is closer to 30 than to 20.

520 600500

520 is closer to 500 than to 600.

Page 5: ESTIMATION AND ROUNDING Rounding two-digit numbers 26 1.Underline the number in the place value you will round. 2. Look at the number to the right of

Estimating sums

1212 ++ 88 --------------

First, round all the numbers using the RULES FOR ROUNDING .Then, perform the operations.

1010 ++ 1010 -------------- 2020

Page 6: ESTIMATION AND ROUNDING Rounding two-digit numbers 26 1.Underline the number in the place value you will round. 2. Look at the number to the right of

Estimating differences

250250 -- 110110 --------------

First, round all the numbers using the RULES FOR ROUNDING. Then, perform the operations.

300300 -- 100100 -------------- 200200

Page 7: ESTIMATION AND ROUNDING Rounding two-digit numbers 26 1.Underline the number in the place value you will round. 2. Look at the number to the right of

Now you practice.

Round these numbers.257836158689324

308040200700300

Page 8: ESTIMATION AND ROUNDING Rounding two-digit numbers 26 1.Underline the number in the place value you will round. 2. Look at the number to the right of

Rounding Whole Numbers Through

Millions

By Mr. Bales

Page 9: ESTIMATION AND ROUNDING Rounding two-digit numbers 26 1.Underline the number in the place value you will round. 2. Look at the number to the right of

Objective

» You will be able to round whole numbers through the millions to the nearest 10, 100, 1,000, 10,000, or 100,000

Page 10: ESTIMATION AND ROUNDING Rounding two-digit numbers 26 1.Underline the number in the place value you will round. 2. Look at the number to the right of

Problem» Each year immigrants from around

the world come to the United States. In 2003, California schools welcomed 175,090 immigrant students.

» What is 175,090 rounded to the nearest thousand?

Page 11: ESTIMATION AND ROUNDING Rounding two-digit numbers 26 1.Underline the number in the place value you will round. 2. Look at the number to the right of

Let’s Hear a Song About Rounding!!

By Mr. Bales

Let's Watch Mr. Parsons!!

http://www.mhschool.com/math/2009/ca/assets/asset_view.html?s=PT_G4_CH1_L6

Page 12: ESTIMATION AND ROUNDING Rounding two-digit numbers 26 1.Underline the number in the place value you will round. 2. Look at the number to the right of

How To Round» Let’s look at this number 175,090.» First, underline the place value that you

want to round.» Then, look at the digit to the right. If the

digit is 4 or less, the digit in the rounding place stays the same.

» If the digit to the right is 5 or more. The digit in the rounding place increases by one.

» Last, change all the digits to the right of the rounding place to zero.

Page 13: ESTIMATION AND ROUNDING Rounding two-digit numbers 26 1.Underline the number in the place value you will round. 2. Look at the number to the right of

Game Time!!» Round to the nearest

hundred» 71,105» 654,354» 678,947» Round to the nearest

ten thousand» 1,256,876» 23,786,983

» Round to the nearest hundred thousand

» 234,654,899» 3,853,216» Round the nearest

million» 34,652,985» 976,634,321

http://www.mhschool.com/math/2009/ca/assets/asset_view.html?s=RW_4_01D

Page 14: ESTIMATION AND ROUNDING Rounding two-digit numbers 26 1.Underline the number in the place value you will round. 2. Look at the number to the right of

Your turn!

Page 15: ESTIMATION AND ROUNDING Rounding two-digit numbers 26 1.Underline the number in the place value you will round. 2. Look at the number to the right of

Your turn!

Page 16: ESTIMATION AND ROUNDING Rounding two-digit numbers 26 1.Underline the number in the place value you will round. 2. Look at the number to the right of

Estimate each product, addition and subtraction.

» 1. 62 X 82 2. 59 X 48 3. 74 X 302

» 4.324587-52418

» 4681+9284» 3177 - 1294

2848+8352

EWL C Reference Manual - NXP Semiconductors · Section number Title Page 13.10 Rounding.....127

Rounding (Nearest 10, 100, 1000) Round each number to the level of accuracy given

P -A Rounding Whole Numbers P are the guidelines for rounding whole numbers when using a number line as a visual tool: ... Identify the place digit. ... Rounding to the largest place

Application of Number Entry 3 Rounding and estimation · Application of Number Entry 3 Rounding and estimation ... Talgrynnu ac Amcangyfrif ... Mae 1 537 469 wedi ei dalgrynnu i’r

Year 6 Curriculum Handbook · Rounding • Rounding numbers to nearest whole number, 10, 100, 1000 • Rounding to 1, 2, 3 decimal places Circles • Label all parts of a circle •

09-20-17 Place Value, Comparing, and Rounding …blogs.ccsd.edu/.../09-20-17-Place...and-Rounding-Decimals-2lhc2yd.pdfRules for Rounding: 1) When rounding identify the number in the

it to the nearest 100. Rounding Maths Mastery Challenge Cardsd6vsczyu1rky0.cloudfront.net/33360_b/wp-content/... · Number and Place Value Rounding Maths Mastery Challenge Cards Lily

Rounding numbers · 2016. 1. 29. · Rounding numbers 18 Year 5 Number and place value Year 5 Number and place value 19 Prior learning • Order whole numbers up to 100,000. • Round

Rounding numbers...Rounding numbers 18 Year 5 Number and place value Year 5 Number and place value 19Prior learning • Order whole numbers up to 100,000. • Round any number up to

Dragon Fire Board Game Rounding up numbers …math4children.com/Boardgames-2/Rounding up numbers...Rounding up numbers Round each number to the nearest 100: 1) 4,110 4,100 2) 3,334

Rounding Numbers 70 80 74 77 600700 630 660. The Rule Look at the number to the right of the rounding number. If that number is 0, 1, 2, 3, or 4, do

13. Rounding off and Scientificscg.ydc.lk/LearnAtHome/Week 06 (25th to 29th May 2020... · 2020. 5. 22. · Rounding off numbers 17 Can you accurately state the total number of spectators

ascending a Ordering decimals and rounding · 6.1 Ordering decimals and rounding ... Test P159 Check P149 Strengthen P151 ... 2 Write each number in words

Number Representation Part 2 Floating Point Representations Rounding

NOTICE - Portland State Universityweb.pdx.edu/~mcclured/Stat Mech/Computer Rounding Error...There are a number of cases of computer rounding errors with serious consequences that one

Rounding decimals Use the number line to round these ......Rounding decimals 1 Show the position of each number on the number line. Use the number line to round these decimals to the

Study Guide: 5.1 Rounding Decimals · Study Guide: 5.1 Rounding Decimals Standard: 5.1-The student, given a decimal through thousandths, will round to the nearest whole number, tenth,

How to Round Whole Numbers. A Number Line When rounding number, some times it helps to remember and to use a number line. | | | | | | | | | | | 0 10 20

Rounding Which number is closer?. Rounding A dress costs $73. Is 73 closer to $70 or closer to $80?…

Estimating & Rounding

Creep and thermal rounding close to the elastic depinning ...€¦ · the rounding effect of the external noise on the depinning transition, and there have been a number of attempts

CONTENT BOOKLET: TARGETED SUPPORT MATHEMATICS...12 Gr 5 athemai Rounding off Numbers 1. Rounding is writing a number as an approximate, a number “about”, “almost” or “closest

Some Exercises in Rounding - AcroTeXSection 3: Round to nearest Whole Number 11 3. Round to nearest Whole Number How do you round to the nearest whole number? This is also called rounding

1 Year 7, 2014 Exam revision ANSWERS. 2 Number : 3.3 Rounding Numbers3.3 Rounding Numbers 1.3 Arithmetic1.3 Arithmetic 1.2 Averages and Range1.2 Averages

Rounding Whole Numbers Rounding Decimals Whole Number Estimation Decimal Estimation * Click the star on the desired box first and then click the box itself

ROUNDING DECIMALS Round to the nearest whole number. · Decimals – Review Packet – Exercises Hanlonmath.com 1 ROUNDING DECIMALS Round to the nearest whole number. 1. 7.4 2. 8.317

Rounding Numbers

cheatsheetbook math 112 - Los Angeles Mission College€¦ · Place Value & Rounding Comparing & Ordering Decimals Rounding Rules Example Example 1. Underline the determined value

0400300200100500 Rounding Off Using Number Line. 0400300200100500 50150250350450 Rounding Off Using Number Line

Feasibility of Implementing a Price Rounding Scheme For ... · neutrality of price rounding to either rounding up or rounding down. Country Practices A number of countries have already

Rounding up numbers - Math 4 children plus...Math4childrenplus.com Name: Date: Rounding up numbers Round each number to the nearest 1,000: 1) 7,641 8,000 2) 5,811 6,000 3) 9,108 9,000

When Double Rounding is Oddmelquion/doc/05-imacs17_1-expose.pdfIntroduction Rounding to odd Applications Conclusion Rounding Double rounding Formalization The formalization of ﬂoating-point

Mathematics Grade Prototype Curriculum Guide · Web viewEstimate whole-number sums and differences, using rounding, front-end strategies, and compatible number strategies. Describe

Bold and Underline

Rounding quick