0可编辑可修改11英文奥数1.maths(English)1)FindthesumofalltheprimenumbersBetween20and30
2)Dividethesumofthefirstfiveoddnumbersbythesumofthefirsttwoprimenumbers
3)Subtract2fromthesumofthefirstfiveevennumbers
Thedifferenceisthendividedbythefirstoddnumberfollowing5
Whatisthequotient4)Findthevalueof[4+8]÷[5×4-6]andgivetheanswercorrectto2decimalplaces1)Alltheprimenumbersbetween20and30are23and29,ThesumofalltheprimenumbersBetween20and30=23+29=522)Thefirstfiveoddnumbersare1,3,5,7and9Thesumofthefirstfiveoddnumbers=1+3+5+7+9=253)Thefirsttwoprimenumbersare2and3Thesumofthefirsttwoprimenumbers=2+3=54)Thefirstfiveevennumbersare2,4,6,8and10Thesumofthefirstfiveevennumbers=2+4+6+8+10=305)Thedifferencebetweenthesumofthefirstfiveevennumbersand2=30-2=286)Thefirstoddnumberfollowing5is7Thequotient=28/7=47)Thevalueof[4+8