27/23 + 5/21 - 4/23 + 0,5 + 16/21

= (27/23 - 4/23) + (5/12 + 16/21) + 0,5

= 1 + 1 + 0,5

= 2,5

27/23 + 5/21 - 4/23 + 0,5 + 16/21

= (27/23 - 4/23) + (5/12 + 16/21) + 0,5

= 1 + 1 + 0,5

= 2,5

Chúc bn học tốt!!!

\(1\frac{4}{23}+\frac{5}{21}-\frac{4}{23}+0,5+\frac{16}{21}\)

\(=\frac{27}{23}+\frac{5}{21}-\frac{4}{23}+\frac{1}{2}+\frac{16}{21}\)

\(=\left(\frac{27}{23}-\frac{4}{23}\right)+\left(\frac{5}{21}+\frac{16}{21}\right)+\frac{1}{2}\)

\(=\frac{23}{23}+\frac{21}{21}+\frac{1}{2}\)

\(=1+1+\frac{1}{2}\)

\(=\frac{5}{2}\)

5^2 bạn ơi

27/23+5/21-4/23+1/2+16/21=(27/23-4/23)+(5/21+16/21)+1/2

                                            =1+1+1/2

                                            =5/2

các bạn thấy hợp lý thì k đúng cho mình nhé........yêu các bạn nhiều

\(\dfrac{16}{21}+\dfrac{4}{23}+\dfrac{5}{21}-\dfrac{4}{23}-\dfrac{5}{21}\)

\(=\left(\dfrac{16}{21}+\dfrac{5}{21}-\dfrac{5}{21}\right)+\left(\dfrac{4}{23}-\dfrac{4}{23}\right)\)

\(=\dfrac{16}{21}+0+0\)

\(=\dfrac{16}{21}\)

\(\dfrac{16}{21}+\dfrac{4}{23}+\dfrac{5}{21}-\dfrac{4}{23}-\dfrac{5}{21}\)

\(=\left(\dfrac{16}{21}+\dfrac{5}{21}-\dfrac{5}{21}\right)+\left(\dfrac{4}{23}-\dfrac{4}{23}\right)\)

\(=\left(\dfrac{16+5-5}{21}\right)+\left(\dfrac{4-4}{23}\right)\)

\(=\dfrac{16}{21}+0\)

\(=\dfrac{16}{21}\)

1, \(\frac{5}{21}+0,5-\frac{19}{23}+\frac{16}{21}-\frac{4}{23}\)

\(=\frac{5+16}{21}-\frac{19+4}{23}+0,5\)

\(=1-1+0,5\)

\(=0,5\)

2,\(\frac{27}{23}+\frac{5}{21}-\frac{4}{23}+\frac{6}{21}+\frac{1}{2}\)

\(=\frac{27-4}{23}+\frac{5+6}{21}+\frac{1}{2}\)

\(=1+\frac{11}{21}+\frac{1}{2}\)

\(=\frac{42+22+21}{42}\)

\(=\frac{85}{42}\)

=27/23+5/21-4/23+1/2+16/21

=682/483-4/23+1/2+16/21

=26/21+1/2+16/21

=5/2

trả lời:

=1.10183747412

đúng ko mk chưa chắc

1/4/23-5/21-4/23+1,5+1/6/21 có giống như này ko ạ:\(1\frac{4}{23}\)-\(\frac{5}{21}\)-\(\frac{4}{23}\)+1,5+1\(\frac{6}{21}\)

=1+4/23-4/23+5/21+16/21+1/2

=1+1+1/2

=5/2

\(\dfrac{27}{23}\) + \(\dfrac{5}{21}\) - \(\dfrac{4}{23}\) + \(0,5\) + \(\dfrac{16}{21}\)

= [ \(\dfrac{27}{23}\) - \(\dfrac{4}{23}\) ] + [ \(\dfrac{5}{21}\) + \(\dfrac{16}{21}\) ] + 0,5

=  1 + 1 + 0,5 

=  2 + 0,5

=  2,5

= 5/2