f1749合数Composite
umbereg468910121415…listthedigitsi
our
umberssystem列出数字系统中的阿拉伯数字。Therearete
0123456789。Combi
atio
softheseareusedtomakeupall
umbers这些阿拉伯数字构成了所有的数。
２、十进制decimalsystem二进制bi
arysystem十六进制hexadecimalsystem一位数1digit
umber两位数2digit
umberlistplacevaluesforthefollowi
g
umber123456789列出下面这个数各位数字的位值。Placevaluestellusbywhichpowerof10tomultiplyadigit位值的意思是，一个数的相邻两位之间相差10倍。9o
e’splace个位8te
’splace十位，8isi
thete
splace7hu
dred’splace6thousa
d’splace5te
thousa
d’splace5isi
thete
thousa
dsplace4100thousa
d’splace3millio
’splace210millio
’splace1100millio
’splace亿位
3、正负数如何用正负数来表示相反的情况？Howaresig
ed
umbersusedtoreprese
topposi
gsituatio
s1Oppositessuchasupa
ddow
orlefta
drightca
bereprese
tedby“”a
d“”Ifupisreprese
tedby“”the
dow
ca
bereprese
tedby“”2Eve
thoughthedista
ceisreprese
tedas25a
d15thetotalmilestraveledis40251525→←（15）3Adepositori
creaseisreprese
tedas4Streetlevelisco
sideredzeroTraveli
gdow
o
elevelwouldbeexpressedas1将下列正负数按从小到大顺序排列Placethesesig
ed
umbersi
orderfrommost
egativetomostpositiveO
a
umberli
ethevaluesof
egative
umbersdecreasefromtheorigi
0totheleftthevaluesofpositive
umbersi
creasefromtheorigi
0totherightabsolutevalue绝对值：Thedista
cealwayspositivebetwee
a
umbera
dzerotheorigi
o
a
umberli
e
510
f中国双语教育网资料
资料搜集：中国双语教育网信息中心
WhatisthesymbolforabsolutevalueThesymbol│x│mea
sabsolutevalueofthetermxi
side
4、代数expressio
表达式：Arelatio
ship关系式represe
tedwith
umbersa
dorsymbolsequatio
等式：Ase
te
cethatusesthesymbol“”tostatsthattheresultoftheexpressio
so
theleftsideisthesameastheresultoftheexpressio
so
therightsidei
equality不等于：Two
umbersthatare
otequaltoeachotherO
e
umbermaybegreatertha
theother
umberorlesstha
theother
umberExpressasa
equatio
列方程式A
umberi
creasedbysixequals63Whatisthe
umber
三、分数fractio
3分子
umerator分数线fractio
strokeorfractio
li
e4分母de
omi
ator
1分数是由基数词和序数词一起来表示的。基数词作分子，序数词作分母，除了分子是“1”以外，其它情况下序数词都要用复数形式。34threefourths或threequarters13o
ethird或athird2425twe
tyfourtwe
tyfifths314threea
dor