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81-10 线性代数 第一题-12 第二题88.急. 数学题!简便计算 12.5×（8.88+8.88+8.88+8.88）.在一小时内回答可加悬赏 数学题作答33 数学题作答12 299×19＋（19＋299）的简便计算 299×19 （19 299）怎么算简便 599999+49999+3999+299+19怎么简便计算 49999+3999+299+19+5的简便计算 497+327的简便计算怎么做 538+497的简便运算. 497-299=简便 脱式计算（能简便的就简便）0.01+1.01×9926×20.2－8.4－1.8 七年级上册数学题和答案 提越多越好 本人现在就用 !速度! 1.某商店积压了100件某种商品，为使这批货物尽快脱手，该商店采取了如下销售方案，将价格提高到原来的2.5倍，再作3次降低处理；第一次降价30%，标出“亏本价”；第二次降价30%，标出“ 求S△的.6.如图3,在△ABC中,点D,E,F分别在三边上,AD,BE,CF相交于点G,BD=2CD,面积S1=S△GCE=3,面积S2=△GDC=4,求S△ABC. 求七年级上数学题 上那找七年级数学题 On a map whose scale is 1:50000 ,a wood is represented by a region of area 6 平方厘米.State the corresponding area on a map whose scale is 1:25000After modification a car will do 25% more miles to the gallon.Calculate the resulting percentage sav 1.uncle Zhao ran around the swimming pool 6 time before he got in the water,the length and width has 30m different,he ran 1080m for total find the length and width of the pool?这是一道英语奥数题!2.Two same length electric line,the first line 1.Jill and Katy _________________________with their class tomrrowA\are going to swimming B\are going swimming C\ go to swimming D\go swimming2.They promised————————————the work in three daysAto finishB finishingCfinishesDfinis 1已知X×X-X-1=0,求-X×X×X-2×X×X+2010的值2已知m×m+n×n-6m+10n+34=0,则m+n的值是多少3Herry 今天和父母去动物园,他们看了许多动物,Herry最喜欢的是大象.假如你是Herry,请用下面的词描述一下今天的经历zo 1,（ ）+（ ）=A （ ）-（ ）=B （ ）除以（ ）=C（括号里填同一个数且ABC三个数的和是108,括号里填几?）根据句子意思补充词语2 the part pf the land that is away from the town.c_ _ _tr_3 a mark on the ground that 问一道用英语出的数学题!急!if the width of a rectangle is increased by 25% while the length remains constant ,the resulting area is what percent of the orginal area? 第二道：Mr jones can mow his lawn in x hours .After 2 hours ,it begin 问一道英语奥数题One day,Lily tows（牵）a fat sheep,come to Jim and says:" Is there about 100 sheep in your sheepfold?" Jim says:" if these sheep first adds the same number of sheep,then adds half number of these sheep,next adds one fourth when 3,5,14 are added to a number,then the twice of the sum of first and third number is lager than second number by121.find the number. 因为到美国不久,但是如果有英语的题就有点困难,“the ) of any nonzero number b is 1/b”我只知道nonzero是非零,但是整段翻译有问题）应该填什么 问一道英文数学题,what is the present value of the following?$845 perpetuity discounted back to the present at 18% 会的来挑战下~When an object is thrown vertically upwards,its height "h" varies with the time "t" according to the equation h=20t - 5t^2.At what times will the heighy be 10m?Use the formula to solve the quadratic equation.Formula就是x=[-b±√ 500页的书编页码,其中“2”在页码中出现了几次,是不是200次?要升学考了,会不会是200次,我们班同学基本都觉得是200次,有同学还数过字典,也是200次,可是大家还是意见不同 一本书的页码是连续自然数当这些页码加起来的时候,某个页码被加了两次,得到不正确的结果2009,则这个被加了两次的页码 是A.56 B.57 C.58D.59 求教奥数题：一本书的页码是连续的自然数1、2、3.,当把这些页数加起来时,由于一个页码被漏加...求教奥数题：一本书的页码是连续的自然数1、2、3.,当把这些页数加起来时,由于一个页码被