X : 0.1 + X * 90 =2015
X x 10+ X x 90 =2015
X x (10+90) =2015
X x 100 =2015
X =2015:100
X = 20,15
X : 0,1 + X x 90 = 2015
X : 10 + X x 90 = 2015
X : (10 + 90) = 2015
X : 100 = 2015
x = 2015 x 100
x = 201500
X : 0.1 + X * 90 =2015
X x 10+ X x 90 =2015
X x (10+90) =2015
X x 100 =2015
X =2015:100
X = 20,15
X : 0,1 + X x 90 = 2015
X : 10 + X x 90 = 2015
X : (10 + 90) = 2015
X : 100 = 2015
x = 2015 x 100
x = 201500
4.7 x 10 + 4.5 : 0.1 + 92 x 0.1 x 90
tinh nhanh
4.7 x 10 + 4.5 : 0.1 + 92 x 0.1 x 90
[1000*0.1-900*0.1-90*0.1]*[142*0.5-240*0.25]
(100*0.1-900*0.1-90*0.1)*(142*0.5-240*0.25)=?
X:0,1 +X*90=2015
Tìm x
X : 0.1 - 9.9 = X x 0.1 + 9.9
tính bằng cách thuận tiện:
67.7 x 90 + 67.7 : 0.1
HELPPPPPPPPP ME PLEASE!!!!!!
Tìm x
X x 90 + X : 0,1 = 2015
(Cần đ.a gấp ạ)
tính nhanh:
1/90:0.25+1/90:0.2+1/90:0.5+1/90:0.125-1/90:0.1