\(\dfrac{5}{4x}=\dfrac{3}{8}+\dfrac{5}{12}\Rightarrow\dfrac{5}{4x}=\dfrac{19}{24}\)
\(\Leftrightarrow4x=\dfrac{5.24}{19}=\dfrac{120}{19}\)
\(\Leftrightarrow x=\dfrac{\dfrac{120}{19}}{4}=\dfrac{30}{19}\)
\(\dfrac{5}{4x}=\dfrac{3}{8}+\dfrac{5}{12}\Rightarrow\dfrac{5}{4x}=\dfrac{19}{24}\)
\(\Leftrightarrow4x=\dfrac{5.24}{19}=\dfrac{120}{19}\)
\(\Leftrightarrow x=\dfrac{\dfrac{120}{19}}{4}=\dfrac{30}{19}\)
5/6 + 5/8 + 3/4
12/15 + 3 + 3/5
4/3 x 7/8 x 5
8/9 x 6/5 : 3
7/12 + 5/8 x 4/3 - 3/4
(8/5 - 7/6) : 13/15 + 1/4
a) 12/5 - 4/9 x 5/6 =
b) 5/6 x 9/20 : 2/3 =
c) 8/9 x 7/4 + 5/12 x 8/3 =
X x 2 và 2/3 = 3 và 4/8 + 6 và 5/12
1-x = 2 và 5/12 : 3 và 5/9
3 và 7/8 x X - 2 và 3/4 = 3 và 6/12 x 10/8 - 1/3
tính nhanh:
7/12 + 4/9 + 1/3 + 5/12 + 2
6/5 x 3/8 + 5/8 x 6/5 - 4/5
Tính :
a) 5 / 12 + 3 / 14 + 7 / 12
b) 15 / 14 x 17 / 18 x 28 / 15
c) 5 / 8 x 5 / 4 + 5 / 4 x 3 / 8
Tính :
a) 5 / 12 + 3 / 14 + 7 / 12
b) 15 / 14 x 17 / 18 x 28 / 15
c) 5 / 8 x 5 / 4 + 5 / 4 x 3 / 8
8/9 + 3/18 ; 5/7 - 4/11 ; 7/9 x 3/4 ; 12/7 : 1/4
3/4 + 4/5 ; 5/7 - 3/5 ; 8/3 x 21/4 ; 7/2 : 9/4
\(x +\dfrac{5}{9} =\dfrac{4}{3}\)
\(x -\dfrac{4}{9}=\dfrac{2}{3}\)
\(\dfrac{5}{8}+x=\dfrac{8}{5} \)
\(\dfrac{5}{6}-x=\dfrac{1}{12}\)
1) Tính
a) 9/12 - 5/12 ; 9/12 - 1/3 ; 7 - 3/2 ; 9/4 - 2
b) 2/7 + 5/7 ; 1/3 + 5/12 ; 2 + 2/5 ; 6/9 + 3
c) 2/3 x 4/7 ; 3/11 x 2 ; 4 x 2/7
d) 8/21 : 4/7 ; 8/7 : 4 ; 5 : 2/3
AI LÀM NHANH VÀ ĐÚNG NHẤT THÌ MÌNH TICK CHO!!!!
Tính:
a) \(\dfrac{11}{10}+\dfrac{3}{5}:\dfrac{2}{3}\)
b) \(\dfrac{4}{3}\) + 5 x \(\dfrac{5}{8}\)
c) \(\left(\dfrac{2}{5}+\dfrac{3}{7}\right)x\dfrac{25}{29}\)
d) \(\dfrac{1}{4}x\dfrac{5}{12}+\dfrac{5}{12}x\dfrac{4}{5}\)