Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
34 - 2 : (3/5-1/2)
34 - 2 : (6/10-5/10)
34 - 2 : 1/10
34 - 2 nhân 10
34 - 20
14
34-2:(3/5-1/2)
=34-2:1/10
=34-20
=14
đúng 100%
ủng hộ nha
tích nha
34-2:(3/5-1/2)
=34-2:(0,6-0,1)
=34-2:0,1
=34-20
=14
\(\dfrac{2}{5}\times15\dfrac{1}{3}-\dfrac{2}{5}\times10\dfrac{1}{3}\)
\(=\dfrac{2}{5}\times\left(15\dfrac{1}{3}-10\dfrac{1}{3}\right)\)
\(=\dfrac{2}{5}\times5\)
\(=2\)
____________________
\(12\dfrac{5}{11}-\left(3\dfrac{1}{4}+2\dfrac{5}{11}\right)\)
\(=12\dfrac{5}{11}-3\dfrac{1}{4}-2\dfrac{5}{11}\)
\(=\left(12\dfrac{5}{11}-2\dfrac{5}{11}\right)-3\dfrac{1}{4}\)
\(=10-3\dfrac{1}{4}\)
\(=\dfrac{27}{4}\)
_______________
\(\dfrac{34}{31}-\dfrac{19}{28}-\dfrac{3}{31}\)
\(=\left(\dfrac{34}{31}-\dfrac{3}{31}\right)-\dfrac{19}{28}\)
\(=\dfrac{31}{31}-\dfrac{19}{28}\)
\(=1-\dfrac{19}{28}\)
\(=\dfrac{9}{28}\)
\(\frac{2}{3}.y+\frac{1}{3}+\left(y+34\right)=\frac{5}{6}\)
\(=\frac{2}{3}.y+\frac{1}{3}+y+34=\frac{5}{6}\)
\(=y\left(\frac{2}{3}+1\right)+\left(\frac{1}{3}+34\right)=\frac{5}{6}\)
\(=\frac{5}{3}y+\frac{103}{3}=\frac{5}{6}\)
\(=\frac{5}{3}y=\frac{5}{6}-\frac{103}{3}=-\frac{67}{2}\)
\(y=-\frac{67}{2}:\frac{5}{3}=-\frac{201}{10}=-20,1\)
\(34-2:\left(\dfrac{3}{5}-\dfrac{1}{2}\right)\\ =34-2:\left(\dfrac{6}{10}-\dfrac{5}{10}\right)\\ =34-2:\dfrac{1}{10}\\ =34-2\times10\\ =34-20\\ =14\)
34 - 2:( \(\dfrac{3}{5}\) - \(\dfrac{1}{2}\))
= 34 - 2: (\(\dfrac{6}{10}\) - \(\dfrac{5}{10}\))
= 34 - 2: \(\dfrac{1}{10}\)
= 34 - 20
= 14