1. [(-25)-(-75]-38= 麻煩ㄌ
2. (-28)-(-36)= 這題可以負負得正嗎
寫過程並詳細說明
謝謝
>_<
2005-09-24 11:43:02 · 7 個解答 · 發問者 Anonymous in 教育與參考 ➔ 其他：教育
[1000-(-2)-(91)]-[(-92)-1000]=
在次麻煩ㄌ
謝謝
>_<
2005-09-24 12:21:01 · update #1
1.[(-25)-(-75)]-38=12
=[-25+75]-38
=50-38
=12
(因為-(-75)要負負得正，變成+75)
2.(-28)-(-36)=8
= -28+36
=8
(因為-(-36)要負負得正，變成+36)
2005-09-26 21:29:27 補充：
[1000-(-2)-(91)]-[(-92)-1000]
=[1000+2-91]+92-1000
=911+92-1000
=3
(因為-(-2)，可以負負得正，變成+2)
(因為-[(-92)，可以負負得正，變成+92)
2005-09-24 11:50:07 · answer #1 · answered by 韓煙 1 · 0⤊ 0⤋
1. [(-25)-(-75]-38= [(-25)+75]-38=50-38=12
2. (-28)-(-36)=(-28)+36=8
當然可以負負得正阿!!
2005-09-24 11:49:24 · answer #2 · answered by Lisa 3 · 0⤊ 0⤋
1. [(-25)-(-75]-38
=[-25+75]-38
=50-38
=12
2. (-28)-(-36)
=-28+36
=8
2005-09-24 11:48:08 · answer #3 · answered by Anonymous · 0⤊ 0⤋
1.[(-25)-(-75)-38]=[(-25)+75-38]=[50-38]=12
2.(-28)-(-36)當然可以負負得正啊~答案是8
2005-09-24 11:46:35 · answer #4 · answered by ? 3 · 0⤊ 0⤋
1. [(-25)+75]-38=50-38=12
2. (-28)-(-36)=-28+36=8
2005-09-24 11:46:19 · answer #5 · answered by Anonymous · 0⤊ 0⤋
1.[-25+75]-38>>>50-38=12
2.-28+36=8
當然是負負得正。
2005-09-24 11:45:25 · answer #6 · answered by 小米糕 7 · 0⤊ 0⤋
可以..........因為沒有括號的--36也是可以用得正-(-36)也是同樣的道理
2005-09-24 11:44:24 · answer #7 · answered by ´WªN ± 7 · 0⤊ 0⤋