7/41 + 5/9 + -7/41 + 16/9
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A
9 tháng 2 2021
\(\left(\dfrac{7}{41}-\dfrac{4}{9}\right)-\left(\dfrac{3}{19}+\dfrac{7}{41}\right)+\left(\dfrac{4}{9}-\dfrac{16}{19}\right)\)
\(=\dfrac{7}{41}-\dfrac{4}{9}-\dfrac{3}{19}-\dfrac{7}{41}+\dfrac{4}{9}-\dfrac{16}{19}\)
\(=-\dfrac{19}{19}\)
\(=-1\)
9 tháng 2 2021
Ta có: \(\left(\dfrac{7}{41}-\dfrac{4}{9}\right)-\left(\dfrac{3}{19}+\dfrac{7}{41}\right)+\left(\dfrac{4}{9}-\dfrac{16}{19}\right)\)
\(=\dfrac{7}{41}-\dfrac{4}{9}-\dfrac{3}{19}-\dfrac{7}{41}+\dfrac{4}{9}-\dfrac{16}{19}\)
\(=-\left(\dfrac{3}{19}+\dfrac{16}{19}\right)\)
\(=-\dfrac{19}{19}=-1\)
28 tháng 7 2023
1: =5/13+8/13-20/41-21/41-5/17
=1-1-5/17=-5/17
2: =1/5+4/5-2/9-7/9+16/17
=16/17+1-1=16/17
3: =1/3-1/5+1/5-1/7+...+1/99-1/101
=1/3-1/101
=98/303
GL
25 tháng 8 2023
a) \(\dfrac{3}{5}+\dfrac{7}{25}=\dfrac{15}{25}+\dfrac{7}{25}=\dfrac{15+7}{25}=\dfrac{22}{25}\)
b) \(\dfrac{8}{11}-\dfrac{19}{33}=\dfrac{24}{33}-\dfrac{19}{33}=\dfrac{24-19}{33}=\dfrac{5}{33}\)
c) \(\dfrac{16}{21}\times\dfrac{3}{5}=\dfrac{16\times3}{21\times5}=\dfrac{48}{105}=\dfrac{16}{35}\)
d) \(\dfrac{14}{41}\div\dfrac{7}{9}=\dfrac{14}{41}\times\dfrac{9}{7}=\dfrac{14\times9}{41\times7}=\dfrac{126}{287}=\dfrac{18}{41}\)
MD
13 tháng 3 2017
\(2,219987543\)1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000%
Kết bạn nha .
13 tháng 3 2017
= 2,219987543........ tk m nhé m là Bùi Lê Thiên Dung
7/41 + 5/9 + -7/41 + 16 / 9
\(= \frac{7}{41} - \frac{7}{41} + \frac{5}{9} + \frac{16}{9}\)
\(\frac{7}{41} - \frac{7}{41} = 0\)
\(0 + \frac{5}{9} + \frac{16}{9}\)
\(\frac{5}{9} + \frac{16}{9} = \frac{21}{9}\)
\(\frac{21}{9}=\frac{7}{3}\)
**Trả lời:
\(\frac{7}{41}+\frac59+\frac{-7}{41}+\frac{16}{9}\)
\(=\left(\frac{7}{41}+\frac{-7}{41}\right)+\left(\frac59+\frac{16}{9}\right)\)
\(=0+\frac{21}{9}\)
\(=\frac{21}{9}.\)