第一題:1加3分之2乘於5=?
第二題:1加{2除與(3乘於5)}減6乘於{4乘與(3除於5)}?
有乘除後加減的問題?
分數題目如何算?
2011-09-22 1:13 pm
回答 (3)
2011-09-22 7:59 pm
✔ 最佳答案
圖片參考：http://imgcld.yimg.com/8/n/AA00628910/o/161109220098613872622320.jpg
這樣有比較好懂吧!!~~??
2011-09-22 12:00:32 補充：
最後答案 要加上負號 因為前面是 17-216
2011-09-24 9:26 pm
第一題 :
1 + (2/3) x 5
= 1 + (10/3)
= (3/3) + (10/3)
= 13/3
=4 又1/3
第二題:
1 + [2 ÷ (3 x 5)] - 6 x [4 x (3 ÷5)]
= 1 + [2÷15] - 6 x [4 x (3/5)]
= 1 + [2/15] - 6 x [12/5]
= 1 + [2/15] - [72/5]
= [15/15] + [2/15] - [216/15]
= (15 + 2 - 216)/15
= -199/15
= -(13 又4/15)
有乘除後加減的問題
1 + (2/3) x 5
= 1 + (10/3)
= (3/3) + (10/3)
= 13/3
=4 又1/3
第二題:
1 + [2 ÷ (3 x 5)] - 6 x [4 x (3 ÷5)]
= 1 + [2÷15] - 6 x [4 x (3/5)]
= 1 + [2/15] - 6 x [12/5]
= 1 + [2/15] - [72/5]
= [15/15] + [2/15] - [216/15]
= (15 + 2 - 216)/15
= -199/15
= -(13 又4/15)
有乘除後加減的問題
參考: Tracy
2011-09-22 3:16 pm
第一題:
1 + (2/3) x 5
= 1 + (10/3)
= (3/3) + (10/3)
= 13/3
= 4又1/3
第二題:
1 + [2 ÷ (3 x 5)] - 6 x [4 x (3 ÷ 5)]
= 1 + [2÷ 15] - 6 x [4 x (3/5)]
= 1 + [2/15] - 6 x [12/5]
= 1 + [2/15] - [72/5]
= [15/15] + [2/15] - [216/15]
= (15 + 2 - 216)/15
= -199/15
= -(13又4/15)
1 + (2/3) x 5
= 1 + (10/3)
= (3/3) + (10/3)
= 13/3
= 4又1/3
第二題:
1 + [2 ÷ (3 x 5)] - 6 x [4 x (3 ÷ 5)]
= 1 + [2÷ 15] - 6 x [4 x (3/5)]
= 1 + [2/15] - 6 x [12/5]
= 1 + [2/15] - [72/5]
= [15/15] + [2/15] - [216/15]
= (15 + 2 - 216)/15
= -199/15
= -(13又4/15)
參考: 賣女孩的火柴
收錄日期: 2021-04-13 18:15:30
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20110922000016KK00986