1. 5/21+0,5-19/23+16/21-4/23
2. 27/23+5/21-4/23+6/21+1/2
giải giúp mình nhé mấy bạn
Những câu hỏi liên quan
8 tháng 12 2021 lúc 20:05
Giúp mình với ạ, mình xin cảm ơn trước ạ !.
\(\dfrac{5}{21}\) + \(\dfrac{1}{2}\) - \(\dfrac{19}{23}\) + \(\dfrac{16}{21}\) - \(\dfrac{4}{23}\)
\(=\dfrac{5}{21}+\dfrac{16}{21}-\left(\dfrac{19}{23}+\dfrac{4}{23}\right)+\dfrac{1}{2}=\dfrac{1}{2}\)
Đúng 3
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1/4/23+5/21-4/23+0,5+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
1\(\dfrac{4}{23}\) +\(\dfrac{5}{21}\) - \(\dfrac{4}{23}\) + 0,5 +\(\dfrac{16}{21}\)
=1+4/23-4/23+5/21+16/21+1/2
=1+1+1/2
=5/2
Đúng 2
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\(\dfrac{27}{23}\) + \(\dfrac{5}{21}\) - \(\dfrac{4}{23}\) + \(0,5\) + \(\dfrac{16}{21}\)
= [ \(\dfrac{27}{23}\) - \(\dfrac{4}{23}\) ] + [ \(\dfrac{5}{21}\) + \(\dfrac{16}{21}\) ] + 0,5
= 1 + 1 + 0,5
= 2 + 0,5
= 2,5
Đúng 3
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27/23--5/21-4/23+16/21+1/2
1 va 4/23 - 5/-21 - 4/23 - 0,5 + 2 va 16/21
tính: 27/23 + 5/21 -4/23 + 16/21 + 1/2
\(\left(\frac{27}{23}-\frac{4}{23}\right)+\left(\frac{5}{21}+\frac{16}{21}\right)+\frac{1}{2}\)
\(=1+1+\frac{1}{2}\)
\(=\frac{5}{2}\)
k cho mk nha!
a. \(\frac{5}{21}+0,5-\frac{19}{23}+\frac{16}{21}-\frac{4}{23}\)
giúp mk vs ai nhanh nhất mk tk cho
\(\frac{5}{21}\)+ \(0,5\) - \(\frac{19}{23}+\frac{16}{21}-\frac{4}{23}\)= 0,5
Chúc học tốt!!!
bạn ghi rõ được ko
=(\(\frac{5}{21}\)+\(\frac{16}{21}\))-( \(\frac{19}{23}\)+\(\frac{4}{23}\)) + 0,5
=1-1+0,5
=0,5
Xem thêm câu trả lời
bài 1
27/23+5/21-4/23+16/21+1/2
3/2-5/6:(1/2)^2+ căn bậc 2 4
Bài 1:
a, Ta có: \(\dfrac{27}{23}+\dfrac{5}{21}-\dfrac{4}{23}+\dfrac{16}{21}+\dfrac{1}{2}\)
= \(\left(\dfrac{27}{23}-\dfrac{4}{23}\right)+\left(\dfrac{5}{21}+\dfrac{16}{21}\right)+\dfrac{1}{2}\)
=\(\dfrac{23}{23}+\dfrac{21}{21}+\dfrac{1}{2}\) = \(1+1+\dfrac{1}{2}\)
= \(2\dfrac{1}{2}\)
Đúng 0
Bình luận (1)
b: \(=\dfrac{3}{2}-\dfrac{5}{6}:\dfrac{1}{4}+2=\dfrac{7}{2}-\dfrac{5}{6}\cdot4=\dfrac{7}{2}-\dfrac{10}{3}\)
\(=\dfrac{21-20}{6}=\dfrac{1}{6}\)
a: \(=\left(\dfrac{27}{23}-\dfrac{4}{23}\right)+\left(\dfrac{5}{21}+\dfrac{16}{21}\right)+\dfrac{1}{2}=2+\dfrac{1}{2}=\dfrac{5}{2}\)
Đúng 1
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a) 21/47 + 9/45 +26/47 + 4/5 (21/47 + 26/47) + (9/45 + 4/5)1+1 2b) 15/12 + 5/13 - 3/12 - 18/13 (15/12 - 3/12) + (18/13 - 5/13)1+1 2c) 13/25 + 6/41 - 38/25 + 35/41 - 1/2 (38/25 - 13/25) + (35/41 + 6/41) + 1/2 1+1 + 1/2 5/2d) 27/23 + 5/21 - 4/23 + 6/21 + 1/2 (27/23 - 4/23) + (6/21 - 5/21) + 1/2 ..........................Đúng không? Phần sau mình tính sao ra kết quả lạ lắm, tính giúp mình.
Đọc tiếp
a) 21/47 + 9/45 +26/47 + 4/5
= (21/47 + 26/47) + (9/45 + 4/5)
=1+1 = 2
b) 15/12 + 5/13 - 3/12 - 18/13
= (15/12 - 3/12) + (18/13 - 5/13)
=1+1 = 2
c) 13/25 + 6/41 - 38/25 + 35/41 - 1/2
= (38/25 - 13/25) + (35/41 + 6/41) + 1/2
= 1+1 + 1/2 = 5/2
d) 27/23 + 5/21 - 4/23 + 6/21 + 1/2
= (27/23 - 4/23) + (6/21 - 5/21) + 1/2
= ..........................
Đúng không? Phần sau mình tính sao ra kết quả lạ lắm, tính giúp mình.
(-3/4+2/3):5/11+(-1/4+1/3):5/11
a)|x-13|-35-45=-47
b)(4+x).(x+3)=0
c)25-(5-x)=120-(28-5)