a: \(=\dfrac{3}{2}\cdot\dfrac{4}{3}\cdot...\cdot\dfrac{2001}{2000}=\dfrac{2001}{2}\)
b: \(=10.1\left(340+120-270\right)=10.1\cdot190=101\cdot19=1919\)
c: \(=24\%+8\%+59\%+9\%=1\)
a: \(=\dfrac{3}{2}\cdot\dfrac{4}{3}\cdot...\cdot\dfrac{2001}{2000}=\dfrac{2001}{2}\)
b: \(=10.1\left(340+120-270\right)=10.1\cdot190=101\cdot19=1919\)
c: \(=24\%+8\%+59\%+9\%=1\)
Tính nhanh
a) ( 1 + 1/2) x ( 1 + 1/3) x ( 1 + 1/4) x ……. X ( 1 + 1/2000)
b) 101 x 34 + 10,1 x 130 – 1,01 x 2700
c) 12/50 + 8% + 59/100 + 9%
tính giá trị biểu thức : 101 x 34 + 10,1 x 130 - 1,01 x 2700
Tính nhanh :
1 . ( 19 x 43 - 26928 : 33 ) x ( 16112 : 53 - 10,1 x 30 )
2. 1996 x 1995 - 996 + 1000 - 1996 x 1994
3. ( 1 + 2 + 4 + ... + 512 ) x ( 101 x 102 - 101 x 101 - 50 - 51 )
4. 10,09 x 100 + 2009 + 200,9 : 0,1 + 2,009 : 0,001
Tính
a) (x-1/2)+(x-1/4)+(x-1/8)+...+(x-1/512)
Tìm x
a) (x-1/1×2)+(x-1/2×3)+...+(x-1/100×101)
b) (x-1)+(x-2)+(x-3)+...+(x-101)=5050
c) x+1/2+1/3+1/4+...+1/100=3/2+4/3+5/4++...+101/100
tính nhanh:
A=3/34 x 10 1/12 x 8/9 x 2 1/8 x 3/13 x 26/37 x 1 9/11 x 3/4
Tìm x :
a) ( x - 1/2)+(x-1/4) = 1
b) ( x -1/2 ) + ( x - 1/4)+(x-1/8)+...+(x-1/512)= 1
c) ( x+ 1/1× 2)+ ( x - 1/2×3)+...+ (x -1/100×101) = 1
Tìm x
a) ( x-1/2)+(x-1/4)+(x-1/8)+...+(x-1/512)=1
b) x+1/2+1/3+1/4+...+1/100=3/2+4/3+5/4+...+101/100
Giải rõ ràng giùm mk với nha
A.(x+1)+(x+2)+(x+3)+......(x+100)=5750
B. x+(1+2+3+4+5+..........+100)=2000
C.(x-1)+(x-2)-(x-3)+(x-4)+........(x-100)=50
Giúp mình với ạ mai mình phải nộp bài rồi
1) Tìm x
a) (1/4 x X - 1/8) x 3/4 = 1/4
b) 12/5 : X = 14/3 x 4/7
c) x + 2/3 = 8 : 4 - 1
2) Thực hiện phép tính:
a) (1/5 + 3/4) x 1/2
b) 13/20 - (1/4 - 5/20)
c) 1/10 + 4/20 + 9/30 + 25/50 + 36/60 + 49/70 + 64/80 + 81/90
d) 2/3.5 + 2/5.7 + 2/7.9 + ... + 2/41.43