168+{[2.(2^4+3^2)-256^0]:7^2}
Những câu hỏi liên quan
4 x 25 - 12 x 5 + 170 : 10
( 7 + 3 mũ 3 : 3 mũ 2 ) x 4 - 3
12 : {400 :[ 500 - ( 125 + 25 x 7 )]}
168 + { [ 2 x (2 mũ 4 + 3 mũ 2 ) - 256 mũ 0 ] : 7 mũ 2
a) 4.25-12.5+170:10
=100-60+17
=40+17
=57
b) (7+33:32).4-3
=(7+3).4-3
=10.4-3
=40-3
=37
c) 12:{400:[500-(125+25.7)]}
=12:{400:[500-(125+175)]}
=12:{400:[500-300]}
=12:{400:200}
=12:2
=6
d) 168+{[2.(24+32)-2560]:72}
=168+{[2.(16+9)-1]:49}
=168+{[2.25-1]:49}
=168+{[50-1]:49}
=168+{49:49}
=168+1
=169
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Thực hiện các phép tính sau:
a) 4.25 - 12.5 + 170 : 10;
b) (7 + 33 : 32).4 - 3;
c) 12 : {400 : [500 - (125 + 25.7)]};
d) 168 + {[2.(24 + 32) -2560] : 72}.
a)
4 . 25 – 12 . 25 + 170 : 10
= (4 . 25) – (12 . 25) + (170 : 10)
= 100 - 300 + 17
= -183
b)
(7 + 33 + 32) . 4 – 3
= (7 + 27 + 9) .4 – 3
= 43 . 4 – 3
= (43 . 4) – 3
= 45
c)
12 : {400 : [500 – (125 + 25 . 7)}
= 12 : {400 : [500 – (125 + 175)}
= 12 : (400: 200)
= 12 : 2
= 6
d)
168 + {[2.(24 + 32) - 2560] : 72}.
= 168 + [2 . (16 + 9) – 1] : 49
= 168 + 49: 49
= 168 + 1
= 167
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a)
4 . 25 – 12 . 25 + 170 : 10
= (4 . 25) – (12 . 25) + (170 : 10)
= 100 - 300 + 17
= -183
b)
(7 + 33 + 32) . 4 – 3
= (7 + 27 + 9) .4 – 3
= 43 . 4 – 3
= (43 . 4) – 3
= 45
c)
12 : {400 : [500 – (125 + 25 . 7)}
= 12 : {400 : [500 – (125 + 175)}
= 12 : (400: 200)
= 12 : 2
= 6
d)
168 + {[2.(24 + 32) - 2560] : 72}.
= 168 + [2 . (16 + 9) – 1] : 49
= 168 + 49: 49
= 168 + 1
= 167
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1, Tính nhanh nếu có thể:a) 18 - 10 : 2 - 7 b) ( 6 . 8 - 10 : 5 ) + 3 . ( -7)c) -8 . 25 . ( -2) - 4 . ( -5)d) 19 . 25 - 19 . 95 - 19 . 20e) -256 . 43 - 256 . 25 - 256 . 32g) -159 . 56 + 43 . ( -159 )h) 29 . ( 19 - 13 ) - 19 . ( 29 - 13 )2, Tìm x:a) -3x + 6 -9b) 10 - 2x 20 - 4xc) ( x + 5 ) . ( x + 4 ) 0 d) ( -2x - 10 ) . ( 3x + 18 ) 0e) ( x - 1 ) . ( x + 2 ) . ( -x - 3 ) 03, Cho: A 1 - 2 + 22 - 23 + ... - 22015 + 22016a) Tính Ab) Tìm x , biết: 3A - 1 2
Đọc tiếp
1, Tính nhanh nếu có thể:
a) 18 - 10 : 2 - 7
b) ( 6 . 8 - 10 : 5 ) + 3 . ( -7)
c) -8 . 25 . ( -2) - 4 . ( -5)
d) 19 . 25 - 19 . 95 - 19 . 20
e) -256 . 43 - 256 . 25 - 256 . 32
g) -159 . 56 + 43 . ( -159 )
h) 29 . ( 19 - 13 ) - 19 . ( 29 - 13 )
2, Tìm x:
a) -3x + 6 = -9
b) 10 - 2x = 20 - 4x
c) ( x + 5 ) . ( x + 4 ) = 0
d) ( -2x - 10 ) . ( 3x + 18 ) = 0
e) ( x - 1 ) . ( x + 2 ) . ( -x - 3 ) = 0
3, Cho: A = 1 - 2 + 22 - 23 + ... - 22015 + 22016
a) Tính A
b) Tìm x , biết: 3A - 1 = 2
a)=18-5-7
=13-7
=5
b)=(48-2)+(-21)
46+(-21)
=25
c)=-200.(-2)+20
=400+20=420
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Thực hiện phép tính:
a) 3 . 52 - 16 : 23 . 2
b) 168 + { [2. ( 24 + 32) - 2560 ] : 72 }
c) 920 : 918 - ( 42 - 7)2 + 8. 52 + 5600 : ( 33 + 18)
Help me,bn nào giỏi toán giúp mk nha,mai thi rùi mà đề khó quá
Đọc tiếp
Thực hiện phép tính:
a) 3 . 52 - 16 : 23 . 2
b) 168 + { [2. ( 24 + 32) - 2560 ] : 72 }
c) 920 : 918 - ( 42 - 7)2 + 8. 52 + 5600 : ( 33 + 18)
Help me
,bn nào giỏi toán giúp mk nha
,mai thi rùi mà đề khó quá
a) \(3.5^2-16:2^3.2\)
\(=3.25-16:8.2\)
\(=75-2.2\)
\(=75-4\)
\(=71\)
b) \(168+\left\{\left[2\left(2^4+3^2\right)-256^0\right]:7^2\right\}\)
\(=168+\left\{\left[2\left(16+9\right)-256^0\right]:7^2\right\}\)
\(=168+\left[\left(2.25-256^0\right):7^2\right]\)
\(=168+\left[\left(50-1\right):7^2\right]\)
\(=168+\left(49:7^2\right)\)
\(=168+\left(49:49\right)\)
\(=168+1\)
\(=169\)
c) \(9^{20}:9^{18}-\left(4^2-7\right)^2+8.5^2+5600:\left(3^3+1^8\right)\)
\(=9^{20}:9^{18}-\left(16-7\right)^2+8.5^2+5600:\left(27+1\right)\)
\(=9^{20}:9^{18}-9^2+8.5^2+5600:28\)
\(=9^{20-18}-9^2+8.25+5600:28\)
\(=9^2-9^2+200+200\)
\(=81-81+200+200\)
\(=200+200\)
\(=400\)
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Các bn giúp mk nha
Tính giá trị biểu thức sau
a) A=2*5^22-9*5^51/25^10 : 5*(3*7^15-19*7^14)/7^16+3/7^15
b) 8^5*16^3/4^13 - 3^33*4^15/6^32
c) C= 1994^(256-1^2)^(256-2^2)^....^(256-50^2)
So sánh các lũy thừa sau
A=(-2017)^2019 và B = ( - 2018)^2020
Bài 3. Tìm x biết:
1) |x| = 10 2) |x - 8| = 0 3) 7 + |x| = 12
4) |x + 1| = 3 5) 15 - x = 16 - (14 - 42) 6) 210 - (x - 12) = 168
1/ `|x|=10<=> x=\pm 10`
2/ `|x-8|=0<=>x-8=0<=>x=8`
3/ `7+|x|=12<=>|x|=5<=>x=\pm 5`
4/ `|x+1|=3`
$\Leftrightarrow\left[\begin{array}{1}x+1=3\\x+1=-3\end{array}\right.\\\Leftrightarrow\left[\begin{array}{1}x=3\\x=-4\end{array}\right.$
5/ `15-x=16-(14-42)`
`<=>15-x=16+28`
`<=>15-x=44`
`<=>x=-29`
6/ `210-(x-12)=168`
`<=>210-x+12=168`
`<=>222-x=168`
`<=>x=54`
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1.
\(\left|x\right|=10\Leftrightarrow x=\pm10\)
2.
\(\left|x-8\right|=0\Leftrightarrow x-8=0\Leftrightarrow x=8\)
3.
\(7+\left|x\right|=12\Leftrightarrow\left|x\right|=5\Leftrightarrow x=\pm5\)
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Xem thêm câu trả lời
tính
( 1/3 - 1/7 - 1/13 ) / ( 2/3 - 2/7 - 2/13 ) x ( 3/4 - 3/16 - 3/64 - 3/256 ) / ( 1- 1/4 - 1/16 - 1/64 ) + 5/8
1) left(dfrac{-3}{4}right)^{3x+1}dfrac{81}{256} 6) left(8x-1right)^{2n-4}5^{2n-4}
2) 172.x^2-dfrac{7^9}{98^3}dfrac{1}{2^3} 7) left(dfrac{1}{2x}-5right)^{20}+left(y^2-dfrac{1}{4}right)^{10}0
3) left(x-dfrac{2}{9}right)^3left(dfrac{2}{3}right)^6
4) left(x+2right)^2+left(y-dfrac{1}{10}right)^20
5) left(x-7right)^{n+1}-left(x-7right)^{n+11}0
Giúp mk với!!...
Đọc tiếp
1) \(\left(\dfrac{-3}{4}\right)^{3x+1}=\dfrac{81}{256}\) 6) \(\left(8x-1\right)^{2n-4}=5^{2n-4}\)
2) \(172.x^2-\dfrac{7^9}{98^3}=\dfrac{1}{2^3}\) 7) \(\left(\dfrac{1}{2x}-5\right)^{20}+\left(y^2-\dfrac{1}{4}\right)^{10}=0\)
3) \(\left(x-\dfrac{2}{9}\right)^3=\left(\dfrac{2}{3}\right)^6\)
4) \(\left(x+2\right)^2+\left(y-\dfrac{1}{10}\right)^2=0\)
5) \(\left(x-7\right)^{n+1}-\left(x-7\right)^{n+11}=0\)
Giúp mk với!!!!!
1: =>3x+1=4
=>3x=3
hay x=1
2: \(\Leftrightarrow172\cdot x^2=\dfrac{1}{2^3}+\dfrac{7^9}{98^3}=\dfrac{1}{2^3}+\dfrac{7^9}{7^6\cdot2^3}\)
\(\Leftrightarrow172\cdot x^2=\dfrac{1}{2^3}+\dfrac{7^3}{2^3}=\dfrac{344}{2^3}\)
\(\Leftrightarrow x^2=\dfrac{1}{4}\)
=>x=1/2 hoặc x=-1/2
3: \(\Leftrightarrow\left[{}\begin{matrix}x-\dfrac{2}{9}=\dfrac{4}{9}\\x-\dfrac{2}{9}=-\dfrac{4}{9}\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=\dfrac{2}{3}\\x=-\dfrac{2}{9}\end{matrix}\right.\)
4: =>x+2=0 và y-1/10=0
=>x=-2 và y=1/10
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\(1) x-5 \sqrt{x}=0 \)
\(2) 2x^7=3x^9\)
\(3) x^6 = 4x^8\)
\(4)x^4=256\)
\(5) (\sqrt{x}-1)^2=0,5625 \)
\(6) x+ \sqrt{x}=0 \)
\(7) x^2=(1^3+2^3+3^3+4^3+5^3).123454321\)
Tìm x nha
thanks nhìu