known number; given number (in math)
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Meanings
1 sense · 4 examplesnoun
known number; given number (in mathematics)
technicalIn algebra and arithmetic, refers to a quantity whose value is explicitly given or fixed, as opposed to an unknown variable. Commonly contrasted with 未知数 (unknown number).
Zài在
fāng方
chéng程
xx
+＋
yy
=＝
55
zhōng中
，
55
shì是
yǐ已
zhī知
shù数
，
xx
hé和
yy
shì是
wèi未
zhī知
shù数
。
In the equation x + y = 5, 5 is the known number, while x and y are unknowns.
Jiě解
fāng方
chéng程
shí时
，
yào要
bǎ把
yǐ已
zhī知
shù数
yí移
dào到
děng等
hào号
de的
yòu右
biān边
。
When solving equations, move the known numbers to the right side of the equal sign.
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Zài在
zhè这
ge个
suàn算
shì式
lǐ里
，
101
hé0
3和
shì3
yǐ是
zhī已
shù知
xū数
，
yào需
wǒ要
men我
qiú们
chū求
jié出
guǒ结
果
。
In this formula, 10 and 3 are known numbers; we need to calculate the result.
Yǐ已
zhī知
shù数
tōng通
cháng常
yòng用
Ā阿
lā拉
bó伯
shù数
zì字
zhí直
jiē接
xiě写
chū出
，
ér而
wèi未
zhī知
shù数
cháng常
yòng用
zì字
mǔ母
biǎo表
shì示
。
Known numbers are usually written directly with Arabic numerals, while unknowns are often represented by letters.