Positive number 正数
Negative number 负数
Rational numbet 有理数
Number axis 数轴
Origin 原点
Opposite number 相反数
Absolute value 绝对值
Power 幂
Ba number 底数
Expoent 指数
Approximate number varsity近似数
Signifcant digit 有效数字
Monomial 单项式
Coefficient 系数
Degree of a monomial 单项式的次数
Polynomial 多项式
Tern 项
Constant tern 常数项
Degree of a polynomial 多项式的次数
Integral expression 整式
Equation 方程
Linear equation with one unknown 大桥英语一元一次方程
六级真题prime numbers 质数
natural numbers 自然数
integer 整数
add 加
reduce 减
multiplication 乘法
division 除法
1。the sum of two numbers is 28.find the numbers if the sum of their squares is a minimum.
两数之和为28。如果两数之积为最小值，两数分别是多少？
2。two numbers have a difference of 16.. find the numbers if the result of adding th
eir sum and their product is a minimum
两数之差为16。如果两数的和与积之和为最小值，求两数分别是几。
3。a uniform border on a framed photograph has the same area as athe photograph. what are the outside dimensions of the border if the dimensions of the photograph are 25 cm by 20 cm .
一个均匀宽度的相框的面积与里面相片的面积相同。若相片长20厘米，宽25厘米，求相框外围的的长宽。
4。a bus company carries about 20000 riders per day for a fare of 90 $ a survey indicates that if the fare is decread. the number of riders will increa by 2000 for every 5$ of decrea. what ticket price would result in the greatest revenue ?
一个公交车公司每天载客量为20000，每人每张票价为90lovely什么意思元。某调查问卷显示，如果票价降低，每降低5元，载客量将增加2000人。为了最高的利润，公司应该把票价定在多少元？
无锡补习班
5。a lifeguard marks off a rectangular swimming area at a beach with 200 m of rope. what is the greatest area of water she can enclo ?
一个救生员用一根200米长的绳子围出一个长方形的游泳面积。她能围出的最大的面积是多少？
Mathematic Forms 数学式
(1) Addition 加法
1+2=3 One and two are three.
2+3=5 Two plus three equals five.
4+0=4 Four and nought is equal to four.
45+70+152=267 45,70 and 152 added are (or make) 267
风向标英语
the sum (or total) is 267.
(2)Subtraction 减法
9-4=5 Nine minus four equals (or is equal to) five.
bimc15-7=8 Seven from fifteen leaves eight.
23,654-8,175=15,479 8,175 (take or subtracted) from 23,654 leaves 15,479.
(3)Multiplication 乘法
1*0=0 One multiplied by nought equals nought.
stateoftheart 1*1=1 Once one is one.
2*1=2 Twice one is two.
3*5=15 Three times five is fifteen
你若不离不弃 我必生死相依英文
6*0=0 Multiply six by nothing, and the result is nothing.
(4)Division 除法
9/3=3 Nine divided by three maks (or is equal to) three.
20/5=4 Five into twenty goes four times.
4567/23=198余13 23 into 4567 goes 198 times, and 13 remainder.
The quctient is 198, and 13 remainder.
witcheryThe sum of n different natural numbers is less than50.the greatest possible value of n is----
2.Let a be the average of all odd prime numbers less than 50.The inreger,most clo to a is----
3.If two even natural numbers x,y satisfy equation x的平方加100等于y的平方,x大于y then x乘y等于----
1. Since there are some controversies, I suppo 0 does not belong to natural numbers in this ca. The answer is quite straight foward, 1+2+3+4+5+6+7+8+9=45. If we add 10, then the sum will exceed 50. So the greatest possible n is 9.
2. First of all, you can list all the odd prime numbers less than 50:3 5 7 11 13 17 19 23 29 31 37 41 43 47. Add them up, and calculate the average. The average a is equal to 23.3. Therefore the integer, most clo to a is 23.
3. x^2+100=y^2,then (y-x)(x+y)=100, since x and y are natural numbers, x+y>0, y sh
ould be larger than x. I am afraid there is either something wrong with the problem or a typing mistake.
You can show me the original version of the problem 3.
