(2/5)^2+5 1/3*(4,5-2)+23/-4
=4/25+16/3*2,5+(-23/4)
=4/25+40/3+(-23/4)
=203/15+(-23/4)
=467/60
(2/5)^2+5 1/3*(4,5-2)+23/-4
=4/25+16/3*2,5+(-23/4)
=4/25+40/3+(-23/4)
=203/15+(-23/4)
=467/60
Bài 1: Tính
a) -7/9 . 2/3/4 (2/3/4 là hỗn số : 2 là số nguyên, 3/4 là phân số)
b) 2/3 + 1/3 . (-2/5)
c) 3/4 . 15/1/3 - 3/4 . 43/1/3
d) (-49,1) . 13/27 - 58,9 . 13/27
e) 0,375 : (-4,5)
f) 3/1/7 : (-1/3/7)
g) 9/1/3 : 4/2/3 - 2
h) (7/3/4 : 0,3125 + 4,5 . 2/2/45) : (-8,5)
Bài 2: Tính giá trị biểu thức
A = (-6/11) . 7/10 . (11/-6).(-20)
B = (-1/9) . (-17/29) . 58/51
C = (-3/7) . 5/11 + (-5/14) . 5/11
D = (1/1/27 . 12/23 . 9/14) : (-3/23)
Bài 3: Tìm x
a) 3/7 . x - 2/5 . x = -17/35
b) (3/4 . x -9/16) . [1/3 + (-3/5) : x] = 0
c) (x + 3/5) . (x + 1) = 0
Bài 1:
\(E=\frac{\left(13\frac{1}{4}-2\frac{5}{27}-10\frac{5}{6}\right)\cdot230\frac{1}{25}+46\frac{3}{4}}{\left(1\frac{3}{7}+\frac{10}{3}\right)\div\left(12\frac{1}{3}-14\frac{2}{7}\right)}\)
Bài 2:
\(G=\frac{4,5\div\left[47,375-\left(26\frac{1}{3}-18\cdot0,75\right)\cdot2,4\div0,88\right]}{17,81\div1,37-23\frac{2}{3}\div1\frac{5}{6}}\)
\(\frac{4,5:\left[47,735-\left(26\frac{1}{3}-18.0,75\right).2,4:0,88\right]}{17,81:1,37-23\frac{2}{3}:1\frac{5}{6}}\)
3-|5-2x|=2,4
8/3/4-2(1-3x)^2=6,75
-4,5:3/8=5x:2/4/3
(X+2):5/2=6/2/5:(x+2)
-12:(3/4-5/6)^2
7/23.((-8/6)-45/18)
23/1/4.7/5-13/1/4:5/7
(1+2/3-1/4)(0,8-3/4)
16/2/7:(-3/5)+28/2/7:3/5
3-|5-2x|= -2,4
8/3/4-2.(1-3x)^2=6,75
-4,5:1/8-5x:2/4/3
(X+2):5/2=6/5/2:(x+2)
Bài 3: Thực hiện phép tính a) \(\left(\frac{2}{5}\right)^{^2}+5\frac{1}{2}:\left(4,5-2\right)+\frac{2^3}{\left(-4\right)}\) b) \(\left(\frac{2}{5}\right)^{^2}+5\frac{1}{2}:\left(4,5-2\right)+\frac{2^3}{\left(-4\right)}\)
Tính
a, 4^5 x 3^2 + 2^10 - 2^3 x 30
b,(2/5) + 5/1/2 x (4,5 - 2) + 2^3/-4
tìm x
37 - x/3 = x - 13/7
Tính :
\(G=\frac{4,5:\left[47,375-\left(26\frac{1}{3}-18,075\right)\cdot2,4:0,88\right]}{17,81:1,37-23\frac{2}{3}:1\frac{5}{6}}\)