Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
rồi, h thì dễ hỉu @@
\(\left(\frac{74}{7}+\frac{19}{5}\right)-\left(\frac{39}{7}-\frac{6}{5}\right)=\frac{74}{7}+\frac{19}{5}-\frac{39}{7}+\frac{6}{5}=\left(\frac{74}{7}-\frac{39}{7}\right)+\left(\frac{19}{5}+\frac{6}{5}\right)=\frac{35}{7}+\frac{25}{5}=5+5=10\)
mk làm lun nha
=22/5+51/9+11/4+3/5+1/3+1/4
=(22/5+3/5)+(11/4+1/4)+(51/9+1/3)
=5+3+6
=14
**** cho mk nha
Ta có:
G=\(3\frac{5}{7}+4\frac{3}{5}+1\frac{2}{7}\)\(+3\frac{1}{5}-\frac{4}{5}\)
=\(3+\frac{5}{7}+4+\frac{3}{5}+1+\frac{2}{7}+3+\frac{1}{5}-\frac{4}{5}\)
=\(\left(3+4+1+3\right)+\left(\frac{5}{7}+\frac{3}{5}+\frac{2}{7}+\frac{1}{5}-\frac{4}{5}\right)\)
=\(11+\left[\left(\frac{5}{7}+\frac{2}{7}\right)+\left(\frac{3}{5}+\frac{1}{5}-\frac{4}{5}\right)\right]\)
=\(11+\left[\frac{7}{7}+\frac{0}{5}\right]\)
=\(11+\left[1+0\right]\)
=\(11+1\)
=12
ĐÃ GIẢI CHI TIẾT RÙI NHÉ. **** NHA
\(4\frac{2}{5}+5\frac{6}{9}+2\frac{3}{4}+\frac{3}{5}+\frac{1}{3}+\frac{1}{4}\)
\(=4+\frac{2}{5}+5+\frac{6}{9}+2+\frac{3}{4}+\frac{3}{5}+\frac{1}{3}+\frac{1}{4}\)
\(=4+\frac{2}{5}+5+\frac{2}{3}+2+\frac{3}{4}+\frac{3}{5}+\frac{1}{3}+\frac{1}{4}\)
\(=\left(\frac{2}{5}+\frac{3}{5}\right)+\left(\frac{2}{3}+\frac{1}{3}\right)+\left(\frac{3}{4}+\frac{1}{4}\right)+\left(4+5+2\right)\)
\(=1+1+1+11\)
\(=14\)
=22/5+51/9+11/4+3/5+1/3+1/4
=(22/5+3/5)+(11/4+1/4)+(51/9+1/3)
=5+3+6
=14
ta có: A = \(1\frac{4}{5}+2\frac{5}{7}+3\frac{4}{5}+4\frac{5}{7}\)
=\(1+\frac{4}{5}+2+\frac{5}{7}+3+\frac{4}{5}+4+\frac{5}{7}\)
=\(\left(1+2+3+4\right)+\left(\frac{4}{5}+\frac{4}{5}+\frac{5}{7}+\frac{5}{7}\right)\)
= 10 + \(\frac{106}{35}\)
= 10 + \(3\frac{1}{35}\)
= \(13\frac{1}{35}\)
\(\frac{1}{2}\times\frac{1}{2}+\frac{1}{2}\times\frac{1}{3}+...+\frac{1}{5}\times\frac{1}{6}\)
\(=\frac{1}{4}+\frac{1}{2\times3}+\frac{1}{3\times4}+\frac{1}{4\times5}+\frac{1}{5\times6}\)
\(=\frac{1}{4}+\frac{1}{2}-\frac{1}{3}+\frac{1}{3}-\frac{1}{4}+\frac{1}{4}-\frac{1}{5}+\frac{1}{5}-\frac{1}{6}\)
\(=\frac{1}{4}+\frac{1}{2}-\frac{1}{6}\)
\(=\frac{3+6-2}{12}=\frac{7}{12}\)
\(\frac{1}{2}\)* \(\frac{1}{2}\)+ \(\frac{1}{2}\)*\(\frac{1}{3}\)+ \(\frac{1}{3}\)* \(\frac{1}{4}\)+ \(\frac{1}{4}\)* \(\frac{1}{5}\)+ \(\frac{1}{5}\)* \(\frac{1}{6}\)
=\(\frac{1}{2}\)* \(\frac{1}{6}\)= \(\frac{1}{12}\)
( Những phân số khác nhau bạn loại đi nhé tại mình ko làm được bước đó trên này bạn thông cảm nhé ! )
theo mk thỳ làm thế này :
\(1\frac{4}{5}+2\frac{5}{7}+3\frac{4}{5}+4\frac{5}{7}\)
= \(\left(1+2+3+4\right)+\left(\frac{4}{5}+\frac{4}{5}\right)+\left(\frac{5}{7}+\frac{5}{7}\right)\)
= \(10+\frac{8}{5}+\frac{10}{7}\)
r bn cộng vô là đc, mk nghĩ thế thôi, sai thỳ thông cảm.
=\(\frac{9}{5}+\frac{19}{7}+\frac{19}{5}+\frac{33}{7}\)
=\(\left(\frac{9}{5}+\frac{19}{5}\right)+\left(\frac{19}{7}+\frac{33}{7}\right)\)
=\(\frac{28}{5}+\frac{52}{7}\)
=\(\frac{456}{35}\)
cho mk nha bn!!!!!!!!!!!!!!!!
= (43/4 + 19/5) - ( 23/4 - 6/5)
= 43/4 + 19/5 - 23/4 - 6/5
= ( 43/4 - 23/4 ) + ( 19/5 - 6/5)
= 5 + 13/5
= 7,6
Thanks bạn nha!!heheh