what is -7/9 – (-13/8)?
回答 (4)
2009-02-19 8:05 am
✔ 最佳答案
The key is to make a common denominator The common denominator of 8 and 9 is 72
Put both of those over 72
(-56 - (-117)) / 72 = 61/72
參考: college student
2009-02-19 5:18 pm
-7/9 - (13/8)
= -7/9 + 13/8
= (-7 x 8)/(9 x 8) + (13 x 9)/(8 x 9)
= -56/72 + 117/72
= (-56 + 117)/72
= 61/72
= -7/9 + 13/8
= (-7 x 8)/(9 x 8) + (13 x 9)/(8 x 9)
= -56/72 + 117/72
= (-56 + 117)/72
= 61/72
2009-02-19 4:36 pm
-56/72 + 117/72 = 61/72
2009-02-19 4:10 pm
-7/9 - (-13/8) = -56/72 - (-117/72) = -56/72 +117/72 = 61/72
收錄日期: 2021-05-01 12:10:50
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