264-(3.x+155)=64
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264 x 45 - 45 x 64
=9000 nha bn
cac bn ung ho nhe!
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264 x 45 - 45 x 64
= 45 x ( 264 - 64 )
= 45 x 200 = 9000 k tớ nha
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BT1: Tính
4) \(\dfrac{\dfrac{1}{3}-\dfrac{1}{7}-\dfrac{1}{13}}{\dfrac{2}{3}-\dfrac{2}{7}-\dfrac{2}{13}}.\dfrac{\dfrac{3}{4}-\dfrac{3}{16}-\dfrac{3}{64}-\dfrac{3}{264}}{\dfrac{1}{4}-\dfrac{1}{16}-\dfrac{1}{64}-\dfrac{1}{264}}+\dfrac{5}{8}\)
\(=\dfrac{\dfrac{1}{3}-\dfrac{1}{7}-\dfrac{1}{13}}{2.\left(\dfrac{1}{3}-\dfrac{1}{7}-\dfrac{1}{13}\right)}.\dfrac{3.\left(\dfrac{1}{4}-\dfrac{1}{16}-\dfrac{1}{64}-\dfrac{1}{264}\right)}{\dfrac{1}{4}-\dfrac{1}{16}-\dfrac{1}{64}-\dfrac{1}{264}}\)
\(=\dfrac{1}{2}.3=\dfrac{3}{2}\)
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264 + { -64 } = ?
Ai tich mik mik tích cho , mik có nhiều nick lắm.
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264 + { -64} =+ {264-64} =+200.Tick nha
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bài 1 : Tìm x
a) 5 + ( x + 27 ) = 64
b) 64 - ( x - 2 ) = 25
c) 7 - ( x + 5 ) + 14 = 343
d) 5 . x - 25 = 10
e) 4 . ( x - 5 ) - 8 = 48
f) 49 - ( 15 + x ) = 12
g) 49 - 7. ( 13 - x ) = 14
h) 155 - 10. ( x + 1 ) = 55
5 + ( x + 27 ) = 64
( x + 27 ) = 64 - 5 ( x + 27 ) = 59 x = 59 - 27 x = 32
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a) \(\Rightarrow x+27=59\Rightarrow x=32\)
b) \(\Rightarrow x-2=39\Rightarrow x=41\)
c) \(\Rightarrow x+5=-322\Rightarrow x=-327\)
d) \(\Rightarrow5x=35\Rightarrow x=7\)
e) \(\Rightarrow4\left(x-5\right)=56\Rightarrow x-5=14\Rightarrow x=19\)
f) \(\Rightarrow15+x=37\Rightarrow x=22\)
g) \(\Rightarrow7\left(13-x\right)=35\Rightarrow13-x=5\Rightarrow x=8\)
h) \(\Rightarrow10\left(x+1\right)=100\Rightarrow x+1=10\Rightarrow x=9\)
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(3924+72*264):64-104
tìm x biết:
a,60+(26-3 nhân x):5=64
b,1236-(4 nhân x-124)=4^4 nhân 4^15:4^16+2^3
c,3^x:3^5=81 nhân 3^6
d,2 nhân x-1234+264=786
a. \(69+\left(26-3x\right):5=64\)
\(\left(26-3x\right):5=64+60=124\)
\(\left(26-3x\right)=64:5=\dfrac{64}{5}\)
\(3x=26-\dfrac{64}{5}=\dfrac{66}{5}\)
\(x=\dfrac{66}{5}:3=\dfrac{22}{5}\)
Vậy...
b. \(1236-\left(4x-124\right)=4^4.4^{15}:4^{16}+2^3\)
\(1236-\left(4x-124\right)=64+8=72\)
\(\left(4x-124\right)=1236-72=1164\)
\(4x=1164+124=1288\)
\(x=1288:4=322\)
Vậy...
c. \(3^x:3^5=81.3^6\)
\(3^x:3^5=59049=3^{10}\)
\(\Rightarrow x:5=10\)
\(\Rightarrow x=10:5=2\)
Vậy...
d, \(2.x-1234+264=786\)
\(2x=786+1234-264\)
\(2x=1756\Rightarrow x=878\)
Vậy...
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tính nhanh
264-86+386-64=.....................
264-86+386-64= 500
thi tốt nha
(264+386)-(86+64)
=650-150
=500
=264-64+386-86
=200+300
=500
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\(\frac{\frac{1}{3}-\frac{1}{7}-\frac{1}{13}}{\frac{2}{3}-\frac{2}{7}-\frac{2}{13}}\times\frac{\frac{3}{4}-\frac{2}{16}-\frac{3}{64}-\frac{3}{264}}{1-\frac{1}{4}-\frac{1}{16}-\frac{1}{64}}\)
Tính nhanh
\(\dfrac{\dfrac{1}{3}-\dfrac{1}{7}-\dfrac{1}{13}}{\dfrac{2}{3}-\dfrac{2}{7}-\dfrac{2}{13}}.\dfrac{\dfrac{3}{4}-\dfrac{3}{16}-\dfrac{3}{64}-\dfrac{3}{264}}{1-\dfrac{1}{4}-\dfrac{1}{16}-\dfrac{1}{64}}+\dfrac{5}{8}\)
\(\dfrac{\dfrac{1}{3}-\dfrac{1}{7}-\dfrac{1}{13}}{\dfrac{2}{3}-\dfrac{2}{7}-\dfrac{2}{13}}\cdot\dfrac{\dfrac{3}{4}-\dfrac{3}{16}-\dfrac{3}{64}-\dfrac{3}{264}}{1-\dfrac{1}{4}-\dfrac{1}{16}-\dfrac{1}{64}}+\dfrac{5}{8}\)
\(=\dfrac{\dfrac{1}{3}-\dfrac{1}{7}-\dfrac{1}{13}}{2\left(\dfrac{1}{3}-\dfrac{1}{7}-\dfrac{1}{13}\right)}\cdot\dfrac{\dfrac{3}{4}\left(1-\dfrac{1}{4}-\dfrac{1}{16}-\dfrac{1}{64}\right)}{1-\dfrac{1}{4}-\dfrac{1}{16}-\dfrac{1}{64}}+\dfrac{5}{8}\)
\(=\dfrac{1}{2}\cdot\dfrac{3}{4}+\dfrac{5}{8}=\dfrac{3}{8}+\dfrac{5}{8}=1\)
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