-5,81 . 5/8 + 6,73 : (-1,6) - 1,54 : -8/5
= -5,81 . 5/8 + 6,73 : -8/5 - 1,54 : -8/5
= -5,81 .5/8 + 6,73 . -5/8 - 1,54 . -5/8
= (-5,81 - 6,73 + 1,54) . 5/8
= -11 . 5/8 = -55/8
Tính:
a) \(\dfrac{-7}{8}\) . \(\dfrac{3}{5}\) - \(\dfrac{2}{5}\) . \(\dfrac{7}{8}\) + \(3\dfrac{7}{8}\)
b) -1,6 : ( 1 + \(\dfrac{2}{3}\) )
c) \(\dfrac{6}{7}\) + \(\dfrac{5}{8}\) : 5 - \(\dfrac{3}{16}\) . ( -2 )\(^2\)
d) \(\dfrac{1^2}{1.2}\) . \(\dfrac{2^2}{2.3}\) . \(\dfrac{3^2}{3.4}\) . \(\dfrac{4^2}{4.5}\)
\(8\frac{1}{5}.\left(11\frac{94}{1591}-6\frac{38}{1517}\right):8\frac{11}{43}\)
\(\frac{1,6:\left(1\frac{3}{5}.1,25\right)}{0,64-\frac{1}{25}}-\frac{\left(1,08-\frac{2}{25}\right):\frac{4}{7}}{\left(5\frac{5}{9}-2\frac{1}{4}\right).2\frac{2}{17}}+0,6.0,5:\frac{2}{5}\)
a) \(1-\left(5\frac{3}{8}+x-7\frac{5}{24}\right):\left(-16\frac{2}{3}\right)=0\)0
b) \(\left(\frac{x}{3}-5\frac{1}{4}\right)^2-\frac{-2}{5}=1\frac{1}{25}\)
c) \(1\frac{1}{3}-25\%\left(x-\frac{8}{3}\right)+2x=1,6:\frac{3}{5}\)
Tính nhanh :
\(\frac{27}{8}\)x \(\frac{5}{7}\)x \(\frac{8}{27}\)+ \(\frac{2}{7}\)
1,6 x\(\frac{25}{32}\)- (\(\frac{2}{3}\)+ \(\frac{4}{5}\)) : \(\frac{11}{5}\)
Câu 1: Thực hiện phép tính:
a) -8,6+ 5,5+ 0,34+ 0,6.
b) (4/5+1/2) : (3/43+8/13)
c) -6,5+ 1,6+ 1,24+ 0,7
d) 7/12+5/12 : 6-11/36
Giúp mình với ,nhanh lên nhé.
Tim x
1) 1/4 + 1/3 : 3x = -5
2) 1- ( 5/3/8 + x - 7/5/24 ) : ( -16/2/3 ) = 0
3) ( 1/1/3 - 25% - 5/12 ) + 2x = 1,6 : 3/5
Tìm x biết
a, 1/7.x = 9/8 - 0,125
b, x - 25% . x = 1/2
c, ( 50%x + 9/4 ) . -2/3 = 17/6
d,( 3x/7 + 1 ) : ( - 4)3 = -1/28
e, (4/3 - 25% - 5/12 ) - 2x = 1,6 : 3/5
X÷(9 và 1/2 - 3/2)=0,4+2/9 - 2/11 phần 1,6+8/9 - 8/11
