X - 100 = 50 x 4
Tính:
a.[100/3]+[100/3^2]+[100/3^3]+[100/3^4]
b.[50/2]+[50/2^2]+[50/2^3]+[50/2^4]+[50/2^5]
c.[x]+[x+2/3]+[x+4/3]+[x+7/3]+[x+10/3] với x=-2,7
x + 25 x 4 = 50 x 50 x 100
x + 25 x 4 = 50 x 50 x 100
x + 25 x 4 = 250000
x + 25 = 250000 : 4
x + 25 = 62500
x = 62500 - 25
x = 62475
x + 25 x 4 = 50 x 50 x 100
x + 25 x 4 = 250000
x + 25 = 250000 : 4
x + 25 = 62500
x = 62500 - 25
x = 62475
\(x+25.4=50.50.100\)
\(x+25.4=250000\)
\(x+100=250000\)
\(x=250000-100\)
\(x=249900\)
1. Tính
a. [100/3] + [100/3^2] + [100/3^3] + [100/3^4]
b. [50/2] + [50/2^2] + [50/2^3] + [50/2^4]
2. Cho x thuộc Q. So sánh [x] và x; [x] và y với y thuộc Z, y < x
Help me!
a) Hãy tính : [-1/7];[3,7];[-4];[-43/10]
b) Cho x = 3,7. So sánh :
A = [x] + [x+1/5] + [x+2/5] + [x+3/5] + [x+4/5] và B = [5x]
c) Tính [100/3] + [100/32] + [100/33] + [100/34]
d) Tính [50/2] + [50/22] + [50/23] + [50/24] + [50/25]
Giúp mik nha
Toán HS giỏi đấy
Thank you
Tìm X
A. (X +1)+(X+2)+(X+3)+…+(X+ 100)=5750
B. X+(1+2+3+4+…+50)=2000
C. (X-1)+(X-2)+…+(X-100)=50
\(c,\)\(\left(x-1\right)+\left(x-2\right)+....+\left(x-100\right)=50\)
\(\left(x+x+...+x\right)-\left(1+2+...+100\right)=50\)
\(100x-5050=50\)
\(100x=50+5050\)
\(100x=5100\)
\(\Rightarrow x=\frac{5100}{100}=51\)
\(a,\left(x+1\right)+\left(x+2\right)+\left(x+3\right)+....+\left(x+100\right)=5750\)
\(\left(x+x+x+...+x\right)+\left(1+2+3+...+100\right)=5750\)
\(100x+5050=5750\)
\(100x=5750-5050\)
\(100x=700\)
\(\Rightarrow x=7\)
\(b,x+\left(1+2+3+...+50\right)=2000\)
\(x+\frac{\left[1+50\right]\cdot\left[\left(50-1\right)\div1+1\right]}{2}=2000\)
\(x+1275=2000\)
\(\Rightarrow x=2000-1275=725\)
c , ( x - 1 ) + ( x - 2 ) + ...... + ( x - 100 ) = 50
( x + x + ........ + ) - ( 1 + 2 + ..... + 100 ) = 50
100x - 5050 = 50
100x = 50 + 5050
100x = 5100
=> x = 5100/100 = 51
756 = 700 + 50 + ….. = 7 x 100 +……. x 10 + 6 b) 862 = …….. x 100 + …….. x 10 + 2 4 x 2 + 4 x 5 + 4 =…………………….. a x 7 + a x 2 + a =……………………. c) abc = ….. … x 100 +……… x 10 + …….
756 = 700 + 50 + 6 hoặc 7 x 100 + 5 x 10 + 6 x 1
862 = 8 x 100 + 6 x 10 + 2
HT
a) 756 = 700 + 50 + 6 = 7 x 100 + 5 x 10 + 6
b) 862 = 8 x 100 + 6 x 10 + 2
c) 4 x 2 + 4 x 5 + 4 = 4 x (2 + 5 + 1) = 4 x 8 = 32
d) a x 7 + a x 2 + a = a x (7 + 2 + 1) = a x 10 = a0
e) abc = a x 100 + b x 10 + c
Chúc bạn học tốt.
😁😁😁
X - 100 = 50 x 4
X - 100 = 50 x 4
X - 100 = 200
X = 200 - 100
X = 100
X - 100 = 50 x 4
X - 100 = 200
X = 200 - 100
X = 100
X - 100 = 50 x 4
X - 100 = 50 x 4
X - 100 = 200
X = 200 + 100
X = 300
X - 100 = 50 x 4
X - 100 = 200
X = 200 - 100
X = 100
X - 100 = 50 x 4
X - 100 = 200
X = 200 - 100
X = 100
Tính :
a, 2013 x 3,64 + 7,26 x 2013 - 2013 x 10,89
b, 3\(\frac{1}{4}\)giờ - 1 giờ 25 phút
c, 100 - 100 : [ 0,4 x 250 - ( 100 - 50% x 50 ) + 25 ]
A)2013x3,64+7,26x2013–2013x10,89
=2013x(3,64+7,26–10,89)
=2013x0,01
=20,13
B) \(3\frac{1}{4}\) giờ —1 giờ 15 phút
=\(3\frac{1}{4}\)giờ —\(1\frac{1}{4}\)giờ
= 2 giờ
a) 2013 x 3,64 + 7,26 x 2013 - 2013 x 10,89
= ( 3,64 + 7,26 -10,89 ) x 2013
= 0,01 x 2013
= 20,13.
b) \(3\frac{1}{4}\)giờ - 1 giờ 25 phút
= 3 giờ 15 phút - 1 giờ 25 phút
= 1 giờ 50 phút.