1/2 *x+3/4*x+ 1/4*x-1/2*x=2015
(1/2+3/4+1/4-1/2)*x=2015
1*x=2015
x=2015:1
=>x=2015
50%.x+3/4.x+0,25.x-1/2.x=2015
x.(1/2+3/4+1/4-1/2)=2015
x.1/2=2015
x=2015:1/2
x=4030
1/2 *x+3/4*x+ 1/4*x-1/2*x=2015
(1/2+3/4+1/4-1/2)*x=2015
1*x=2015
x=2015:1
=>x=2015
50%.x+3/4.x+0,25.x-1/2.x=2015
x.(1/2+3/4+1/4-1/2)=2015
x.1/2=2015
x=2015:1/2
x=4030
50% x x + 3/4 x x + 0.25 x x 1/2 x x = 2015
tinhs giá trị biểu thức: ( 75% + 0.65 + 1/4 + 35%) x ( 1/4 x 2 + 25% x 3 + 0.25 x 5)
0,25 X x = 0,75+0.25
x : 1.25=1/4 - 0.25
0.25 * x = 0.75 + 0.25
870 - x : 11 x 87 = 261 x : 0.25 x 2.3 = 6.9 2 x (y + y ) = 8.16 y x 1.5 + y + y x 7.5 = 59.8 m : 1/6 + m : 0.25 = 152 m : 1/3 + m : 0.25 = 1.4 giải dùm mình gấp nhé
tinhs giá trị biểu thức:
( 75% + 0.65 + 1/4 + 35%) x ( 1/4 x 2 + 25% x 3 + 0.25 x 5)
Tính nhanh
1) 9 x 10 + 10 x 11 + 11 x 12 + ....+ 2015 x 2016
2) 1 x 2 x 3 + 2 x 3 x 4 + 3 x 4 x 5 + ....+ 2015 x 2016 x 2017
12.48 : 0.5 x 6.25 x 4 x 2
_____________________
2 x 3 x 1.25 / 0.25 x 10
Tìm x :
a) x : 0.25 + x : 0.1 = 10.3
b) x * 3 : 7.5 + 42.6 = 51.6
c) 4/7 : x * 3/2 + 1/2 = 13/7
1/2015 x 2/2015 x 3/2015 x 4/2015 x 5/2015 x .... x 10/2015
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