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Houghton Mifflin Math Grade 5 (Tài liệu học Toán bằng Tiếng Anh lớp 5)
~ HOUGHTON MIFFLIN
BOSTON
~ HOUGHTON MIFFLIN
wsrON
Educolion Place- is 0 registered Irademar~ at Houghlon Miftlin Company.
Capyrigll CW07 by Houghton Milfljn Company. AU riglls reserved.
No pert at this wor~ rnov be reproduced or Ircrrsmilled in any rorm or by any Jl1El(I'l$, electronic
Of ",acholliool. Including pho!OCOllYlng Of recording, Of by any InrOfmation stOfaga Of retr;a..a
system "";thout tha pr"" wrillElfl permission at Houghlon Miffiln Company unless such copving is
expressly permilled by rederd oopyriglt 1cM, Acldress inqo.Wies 10 School Permissions. Houghton
MffIin Company, 222 Berkeley Street, Boston, MA 02116
Printed In tha U.S.A.
ISBN·13: 978·0·618·59095·7
ISB~HO: 0·618·59095·1
23'156789·QW-09 08 07 06
Houghton Mifflin
Math
Program Authors and Consultants
• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • ••
Authors
•
Professor
...-
01 M:::IIhefrotics
Consultants
D•. Lee 511ft
Strategic Consultanl
Professor of Molhemo!ics
Or. Uplng Ma
...-
-~
C""»",, SIale Lniversiry Carnogie
F«ndolion
Booton lhver$ily
Boston. MA
Adeirjl, NC
Dr. Mati La.son
Or. B.UCiI R. Vogell
eu.icUum 5pecioIisl for
Molhelloolics
Oil'I'ord 6<_ l.\)lOn
Professor 01 Mo!he<.OOT'c$
Nonh
Tlling
Palo Aha, CA
Langu~ ond
Voeabulary Consullant
Dr. David Chord
Prolessot 01 Aeolilog
Lniversily 01 Oregon
. . . . . OR
Dr. Korol \'eon,
Associate Professor
lhve'V
-,-
Jell'erSf North E\eI~'._oIor.,
Bixt>or. OK
e....
SChool
Grllhom, NC
J""" 1lI,lgor
i..(MTiI!I EIemen1cry School
Elgin. IL
Shoron O'O,len
Echo Mol.w1lo<:Io oj E\eI •• oIcay SChool
Go:geS loke. II
$lepl>anl, McDaniel
B.
e11 Jonl""
Patricio Heintz
Ro.. Marie Bruno
M::Jwbey SI<&el Elern8'V
Lynn Fo.
KMoUIVhlollilo E1.".... ,
.._OK
........ McDonald
Sr....... The E\O'IIJIliSI
..-
0£r0.I'tW
Mod*
\AbQgon, IL
............Angelo McC'''Y
West Bko'liliold. Ml
Maoy Popo.1ch
ibizon
Han!>'.ef A:I1l, Il
e...,...., SChool
Debbie Taylor
Sonot<>'l Sky a.m.. oICI'y
..-
...... ""
..-
e - aen-, SChool
Ellen O'ROUth
Across Grades
Gcwy Srnlltl
lhoInotH. Ford Dow'..... ,
I..d3'd
Objective Read and Wlita numbers IMlogh horl.pand9d 101m.
Learn Aboul II
Saint Lucia is located in the Caribbean Sea. In 2001.
the population of Saint Lucia was 158.178.
Look at the chan. The ~alue of a digit in a number is
detennined by its place, For example. the first 8 from
the left in 158.178 has a place value of 8.000. The
second 8 has a place value of 8.
i, ,I !•
In a number. each group of 3 digits from right to left
called a period. is separated by a comma.
Different Ways
WayO
to Read and Write Numbers
You can usa
standard lorm .
158.178
Waye
You can use word lorm.
Waye
You can use
expanded form.
100.000 + 50.000 + 8,000 + 100 + 70 + 8
- (1 x 100,0(0) + (5 x 10.000)
+ (8 x 1.0(0) + (1 x 100) + (7 x 10)
+(8x 1)
Way
one hundred fifty·eight thousand.
one hundred seYenty·e~hI
Guided Practice
Write each nllmber in standard lorm.
1.
45 thousand, 79
2. three hundred sidy thousand. nine hundred eight
0
You can use short
word form.
158 lhousarld. 178
..~\t YOUNelf
• Whal Is the greatest
pIaoa vatue In !he
~-"
• What is !he >'ill"" lor
eaell pIaoa?
3. 400.000 + 8.000 + 600 + 20
bplain Your Thinking . . In Exercise 1. how did YO" decide in which
places to write the digits 4 and 5?
4
,I !•
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