What rational number is equivalent to the expression 69 2/9 - 31 1/9 - (-12 4/9)?
回答 (2)
2016-06-14 3:47 am
69 (2/9) - 31 (1/9) - [-12 (4/9)]
= 69 (2/9) - 31 (1/9) + 12 (4/9)
= [69 - 31 + 12] + [(2/9) - (1/9) + (4/9)]
= 50 + [(2 - 1 + 4)/9]
= 50 (5/9)
= 69 (2/9) - 31 (1/9) + 12 (4/9)
= [69 - 31 + 12] + [(2/9) - (1/9) + (4/9)]
= 50 + [(2 - 1 + 4)/9]
= 50 (5/9)
2016-06-14 3:47 am
( 69 -31+12)+(2/9 - 1/9+ 4/9) = ...
收錄日期: 2021-04-18 14:59:17
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20160613194155AAljpI4