【評論主題】12、已知五個連續的正整數之總和為135,則此五數中最大者為多少?(A)35 (B)39 (C)25 (D)29
【評論內容】
設五個連續整數分別為x-2、x-1、x、x+1、x+2
題目說五個連續整數的總和為135,
故可以列出以下算式:
(x-2)+(x-1)+(x)+(x+1)+(x+2)=135
整理可得:5x=135,x=27
求此五數最大者為x+2,代入可得最大數為29
【評論主題】10.已知兩正整數,大數比小數的2倍少20,且大數與小數的和為16,則這兩數分為多少?(A)4、12(B)7、9 (C)6、10(D)不存在
【評論內容】設其中一數為x,另一數為2x-20(2x-2........
【評論主題】4.父親今年歲且比兒子大30歲試問經過y年後,父親與兒子的年齡和為多少歲?(A) x+y-30 (B) 2x+y-30 (C) 2x+2y-30 (D) x+2y-30
【評論內容】今年(歲)y年後(歲)父親xx+y兒子x-30(☆-30)...
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【評論內容】3x-[3-(x-2)]=353x-(3-☆+2........
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【評論內容】在文中第12~13行寫道Bark?Why ☆☆ ☆☆☆ ...
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【評論主題】10.已知兩正整數,大數比小數的2倍少20,且大數與小數的和為16,則這兩數分為多少?(A)4、12(B)7、9 (C)6、10(D)不存在
【評論內容】設其中一數為x,另一數為2x-20(2x-2........
【評論主題】4.父親今年歲且比兒子大30歲試問經過y年後,父親與兒子的年齡和為多少歲?(A) x+y-30 (B) 2x+y-30 (C) 2x+2y-30 (D) x+2y-30
【評論內容】今年(歲)y年後(歲)父親xx+y兒子x-30(☆-30)...
【評論主題】15.A:How often do you wash your dog? B:______ a week. I wash it every Saturday.(A) One (B) First (C)
【評論內容】A:你多久洗一次狗?B:每個禮........
【評論主題】12.如圖,每一個方格皆同等大小,若交叉部分代表 ,則空白部分代表的數是多少? (A) (B) (C) (D)
【評論內容】設一格面積為x5x=25/7x=5/7空........
【評論主題】16.解3x-〔3-(x-2)〕=35,則x=(A)5(B)10(C)20 (D)30
【評論內容】3x-[3-(x-2)]=353x-(3-☆+2........
【評論主題】【題組】34. A(n)________can “bark”.(A) cat(B) elephant(C) dog (D) fish
【評論內容】在文中第12~13行寫道Bark?Why ☆☆ ☆☆☆ ...
【評論主題】【題組】32. What’s wrong with Lisa?(A) She has a sore throat.(B) She can’t bark.(C) She worries about he
【評論內容】在文中第8行寫道Lisa is very ☆☆☆☆. ...
【評論主題】9. 在□內應填入下列哪一個運算符號才會使「52 - 12 □3=16 」成立?(A)+ (B)-(C)✖ (D)÷
【評論內容】(A)52-12+3=43(B)52-12-3=37........
【評論主題】【題組】41. Which is NOT one of them? (A)Carrying things to shoppers’ cars. (B)Keeping the store clean.
【評論內容】"them" 指的是店員需要工.....★★★★★★...
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【評論內容】A:你可以幫我修電腦嗎?不知道為什麼它突...