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

\(\text{∘ Ans}\)

`A =`\(\left(\dfrac{27}{23}+\dfrac{1}{2}\right)-\left(\dfrac{5}{21}+\dfrac{4}{23}\right)-\dfrac{37}{21}\)

`=`\(\dfrac{27}{23}+\dfrac{1}{2}-\dfrac{5}{21}-\dfrac{4}{23}-\dfrac{37}{21}\)

`=`\(\left(\dfrac{27}{23}-\dfrac{4}{23}\right)+\left(-\dfrac{5}{21}-\dfrac{37}{21}\right)+\dfrac{1}{2}\)

`=`\(\dfrac{23}{23}-\dfrac{42}{21}+\dfrac{1}{2}=1-2+0,5=1-1,5=-0,5\)

-0,5

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

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

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

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

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

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

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

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

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

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

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

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

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

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

=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\(\frac{6}{21}\)

Câu a : - 891 / 100 = - 8 , 91

Câu b : - 21 / 4 = - 5 , 25

Câu c : 5 / 2 = 2 , 5

Câu d : 4096 / 387 = 11 ( đã làm tròn )

Câu e : - 3 / 2 = - 1 , 5

Bạn trình bày cụ thể đc ko ??

( 27/23 - 4/23 ) + ( 5/21 + 6/21 ) + 1/2 = 1 + 11/21 +1/2 = 85/42

hình như bạn ghi có chút nhầm lẫn !

27/23 + 5/21 - 4/23 + 6/21 + 1/2

=> A = ( 27/23 - 4/23 ) + ( 5/21 + 6/21 ) + 1/2

=> A = 1 + 1 + 1/2

<=> A = 5/2

~ ủng hộ mk nha ~