iplier；积product3X4＝Howmuchisthreetimesfour3X412Threetimesfouristwelve．Multiplythreebyfour，wegettwelve．Threemultipliedbyfourmakestwelve．三乘以四等于十二I
amultiplicatio
equatio
thesearethetwoormore
umberswhicharemultipliedtogetherA
y
umbermultipliedby1isitselfTomultiplya
umberbyte
simplyaddazeroatthee
doftheorigi
al
umber0和任何数相乘都得0。Commutativepropertyofmultiplicatio
乘法交换率Ifaa
dbarereal
umbersthe
a×bb×a，cha
gi
gtheorderofthefactorsdoes
otcha
getheproductIsadditio
commutativeIssubtractio
commutativeIsmultiplicatio
commutativeIsdivisio
commutativeassociativepropertyofmultiplicatio
结合率Ifaba
dcarereal
umbersthe
abcabccha
gi
gthegroupi
gofmultiplyi
gfactorsdoes
otcha
getheproductdistributivepropertyofmultiplicatio
overadditio
乘法对加法的分配率：Ifaba
dcarereal
umbersthe
abcabacForeveryreal
umber”a”a0a0istheide
tityeleme
tforadditio
Foreveryreal
umber“a”a×1a1istheide
tityeleme
tformultiplicatio

5“除”用divide的过去分词形式表示
210
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
除dividedby介词divide动词divisio
名词可被整除的数divisible；被整除dividedeve
ly；被除数divide
d；除数divisor；余数remai
der；商quotie
t
16÷4Howmuchissixtee
dividedbyfour16÷4＝4Sixtee
dividedbyfourisfour．Sixtee
dividedbyfourequalsgivesmakesfour．
6表示“
次方”的说法：指数用序数词，底数用基数词。10的7次方theseve
thpowerofte
（te
totheseve
thpower）6的10次方thete
thpowerofsix（sixtothete
thpower）AzerofactoralwaysgivesazeroproductTheproductoftworeal
umbersmaybe0o
lyifo
efactoris0Dividi
gbyzerois
otdifi
eda0a
da÷0are
otdefi
edZerodividedbya
y
o
zeroreal
umberequalszeroForthepairof
umbersselectthecorrectsymbol≤greatertha
orequalto≥lesstha
greatertha
approximatelyequalto≈
otequalto≠filli
thebla
kO
eislesstha
o
ehu
dredFortyfourisgreatertha
sixNi
eequalsthreetimesthree
7、Theorderofoperatio
sregardi
gadditio
subtractio
multiplicatio
etc运算顺序：
1pare
thesesdocalculatio
swithi
groupi
gsymbolssuchas2Multiplicatio
Divisio
fromlefttoright3Additio
Subtractio
fromlefttoright记“PleaseExcuseMyDearAu
tSally”（括号、指数、乘法、除法、加法、减法）
Hi
tRemember“PleaseExcuseMyDearAu
tSally”pare
thesesExpo
e
tsMultiplicatio
Divisio
Additio
Subtractio
Expressthefollowi
gusi
gmathematicalphrases用数学语言表达1Te
i
creasedbytheproductofsixa
dthree2Eightdecreasedbr