=3/4-3/2+1/2:5/12-9/4
=-3/2-3/2+1/2*12/5
=-3+12/10
=-3+6/5=-9/5
=3/4-3/2+1/2:5/12-9/4
=-3/2-3/2+1/2*12/5
=-3+12/10
=-3+6/5=-9/5
Tính:
\(a,\left(\dfrac{5}{12}-\dfrac{3}{4}\right).\dfrac{-6}{5}+\dfrac{-7}{6}\)
\(b,\left(5\dfrac{1}{2}-5\right)^2+\dfrac{-1}{6}:\dfrac{5}{3}\)
\(c,75\%-1\dfrac{1}{2}+0,5:\dfrac{5}{12}\)
Tìm x, biết:
a) x+\(\dfrac{1}{6}\)=\(\dfrac{-3}{8}\) b) \(2-\left(\dfrac{3}{4}-x\right)=\dfrac{7}{12}\)
c) \(\dfrac{1}{2}x\)+\(\dfrac{1}{8}x=\dfrac{3}{4}\) d) 75%-\(1\dfrac{1}{2}+0,5:\dfrac{5}{12}-\left(\dfrac{-1}{2}\right)^2\)
Thực hiện phép tính (tính nhanh nếu có thể)
c) \(5\dfrac{2}{5}\)✖\(4\dfrac{2}{7}\)+\(5\dfrac{5}{7}\)✖\(5\dfrac{2}{5}\)
d) 75%-\(1\dfrac{1}{2}\)+0,5:\(\dfrac{5}{12}\)-\(\left(\dfrac{-1}{2}\right)^2\)
trả lời z là đủ r đến lượt hỏi:
75% - \(1\dfrac{1}{2}\) + 0,5 . \(\dfrac{12}{5}\)
A= ( -6,17 + \(3\dfrac{5}{9}\) - \(2\dfrac{36}{97}\)) . (\(\dfrac{1}{3}\) - 0,25 - \(\dfrac{1}{12}\))
B= \(\dfrac{0,5-\dfrac{3}{17}}{\dfrac{5}{6}-\dfrac{5}{17}}\) + \(\dfrac{0,5-\dfrac{1}{3}-0,2}{\dfrac{7}{5}+\dfrac{7}{3}-3,5}\)
\(25\%-1\dfrac{1}{2}+0,5.\dfrac{12}{5}\)
50% -\(1\dfrac{1}{2}\)+\(\dfrac{5}{12}\):0,5
Tìm:
a) \(1\dfrac{2}{3}\) của 8,1 b) \(1\dfrac{3}{5}\) của -4,5
c) 75% của \(2\dfrac{4}{5}\) d) \(1\dfrac{3}{8}\) của \(3\dfrac{1}{12}\)
Bài 1: Thực hiện phép tính ( tính nhanh nếu có thể )
a) ( 12,36 - 0,61 ) - ( 50,39 - 12,64 )
b) \(\left[\dfrac{-1}{12}\right]^2-1\dfrac{1}{2}+0,5.\dfrac{12}{5}+5\%\)
3. b) \(1\dfrac{13}{15}\).(0,5)2.3+(\(\dfrac{8}{15}\)-\(1\dfrac{19}{60}\)):\(1\dfrac{23}{24}\)
c) (-2)3.\(\dfrac{-1}{24}\)+(\(\dfrac{4}{5}\)-1,2):\(\dfrac{2}{15}\)
d) (\(\dfrac{-2}{5}\))2+\(\dfrac{1}{2}\).(4,5-2)-255