Tom had 6 books. He gave 2 to his sister and then purchased 3 more books at the bookstore. Which of the following mathematical e

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问题 Tom had 6 books. He gave 2 to his sister and then purchased 3 more books at the bookstore. Which of the following mathematical expressions is equivalent to the number of books that Tom now has?

选项 A、6-2 + 3
B、6 + 2-3
C、6(2 + 3)
D、6(2 - 3)

答案6-2 + 3

解析 You are given that Tom started out with 6 books. After he gave 2 books to his sister he was left with 6-2 books. He then purchased 3 more books, so he now has 6-2 + 3 books.

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Tom had 6 books. He gave 2 to his sister and then purchased 3 more books at the bookstore. Which of the following mathematical e

GRE QUANTITATIVE

GRE

ThefirstyearofschoolinAmerica,knownaskindergarten,usuallybeginsbetweentheagesoffiveandsix.Amongrichcountrie

Scientistsmeasuredtheimpactthatpeoplehaveontheenvironmentusingatermcalledcarbon"footprint."Thatfootprintrefle

AsTheplanecircledovertheairport,everyonesensedthatsomethingwaswrong.Theplanewasmovingunsteadilythroughtheair

Inthefigureabove,pointsA,B,C,andDarecollinearandaresemicircleswithdiametersd1cm,d2cm,andd3cm,respective

Isthequadrangleasquare?(1)Thesumofthreeinterioranglesis270.(2)Threesidesofthequadrangleequals.

Iftheareasofthreeofthefacesofarectangularsolidare6,10,and15,whatisthevolumeofthesolid?

Ifthelengthsoftwoofthesidesofatriangleare9and10,whichofthefollowingcouldbethelengthofthethirdside?Ⅰ.

Apolygonwithfoursidesandfourrightangleshasonesideof6mm.Iftheareaofthepolygonis42mm2,wouldthepolygonbe

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在下列哪一时相中，肺内压等于大气压

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建设工程项目管理的运行机制由施工成本核算制与()共同构成。

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