a) ( 814 : 412 ) : ( 166 : 82 )
= [ ( 23 )14 : ( 22 )12 ] : [ ( 24 )6 : ( 23 )2 ]
= ( 242 : 224 ) : ( 224 : 26 )
= ( 242 - 24 ) : ( 224 - 6 )
= 218 : 218
= 218 - 18
= 20 = 1
b) ( 95 . 32 ) : ( 275 : 81 )
= [ ( 32 )5 . 32 ] : [ ( 33 )5 : 34 ]
= ( 310 . 32 ) : ( 315 : 34 )
= ( 310 + 2 ) : ( 315 - 4 )
= 312 : 311
= 312 - 11
= 3
các số 0.4 ; 2/5 ; 3/11 ; 4/5 ; 6/22 biểu diễn mấy điểm trên trục số
tính (0.4-2/9+2/11)/(7/9-1.4-7/11)-(1/3-0.25+1/5)/(1/1/6-0.875+0.7):(1^2+2^2+...+2018^2)
tìm x biêt :
a)[ 2x ] = -1
b) [x+0.4]=3
c)[2/3.x-5]=3
((2.1^2-4.01)^2*2.5+7.3):(1.9-0.4^2-(4/5)^2)
Giải hộ mình bài này với
Tính nhanh
\(\frac{\frac{2}{3}-0.4-\frac{2}{7}+\frac{2}{11}}{\frac{13}{3}-2.6-\frac{13}{7}+\frac{13}{11}}\)
\(0.4-2/9+2/11/1.4-4/9+4/11\)
\(0.4\left(3\right)+0.6\left(2\right)\cdot2\frac{1}{2}\cdot\left[\left(\frac{1}{2+\frac{1}{3}}\right):0.5\left(8\right)\right]:\frac{50}{53}\)
(x-1/5)^2004 +(y 0.4)^100 +(z-3)^678
A=\(\left(\frac{0.4-\frac{2}{9}+\frac{2}{11}}{1.4-\frac{7}{9}+\frac{7}{11}}-\frac{\frac{1}{3}-0.25+\frac{1}{5}}{1\frac{1}{6}-0.875+0.7}\right):\left(1^2+2^2+3^2+...+2015^2\right)\)