\(\dfrac{13}{5}x\dfrac{1}{4}x\dfrac{3}{2}\)
=\(\dfrac{13}{20}x\dfrac{3}{2}\)
=\(\dfrac{39}{40}\)
`13/5xx1/4xx3/2`
`=(13xx1xx3)/(5xx4xx2)`
`=(13xx3)/(20xx2)`
`=39/40`
\(\dfrac{13}{5}x\dfrac{1}{4}x\dfrac{3}{2}\)
=\(\dfrac{13}{20}x\dfrac{3}{2}\)
=\(\dfrac{39}{40}\)
`13/5xx1/4xx3/2`
`=(13xx1xx3)/(5xx4xx2)`
`=(13xx3)/(20xx2)`
`=39/40`
Cho P = 5/2 x 1 + 4/1 x 11 + 3/11x2 + 1/2 x 15 + 13/15 x 4 + 15/4 x 43 + 13/43 x 18
3/7 + 4/5 + 4/7
3/2 x 4/5 x 2/3
4/6 + 7/13 + 17/9 + 19/13 + 1/9 + 14/6
315/316 x 316 /314 x 316/315 x 317/313
Cần gấp lắm , giúp nha , hứa thick
a)11/13 - ( 5/42 - x ) = -(15/28 - 11/13)
b) x + 1/3 = 2/5-(-1/3)
c) 2/3x + 5/7 = 3/10
d)3/7-x=1/4-(-3/-5)
e)-21/-13.x+1/3=-2/-3
Thick nhiều ạk
4, tính nhanh
5và 1/2+6 và 11/12 +9 và 2/13
(1-3/4)x(1-3/7x(1-3/10)x(1-3/13)x....x(1-3/13)x1- (3/100)
ai nhanh 10 tick
1.Tìm số tự nhiên x biết 1) (x-35) -120=0 2) 310-(118-x) =217 3) 156-(x+61)=82 4) 814-(x-305)=712 5) 100-7-(x-5)=58 6) 12(x-1):3=4^3+2^3 7) 24+5x=7^5:7^3 8) 5.(x-1) :3=4^3+2^3 9) 5(x-4)^2-7=13 10) (x+1)+(x+2)+....(x+30)=795 Giúp em với Mai em đi học rồi Help
1, 2x - 35 = 15
2, 3x + 18 = 12
3, /x - 1/ =0
4, -13 /x/ = -26
5, 4 - (27 -3 ) = x - (13 -4)
6, 47 - ( x + 15 ) = 21
7, -5 - ( 24 - x ) = -11
8, 6 - /x/ = 2
9, 6 + /x/ = 2
tim x
(3/5-x)+13/20=5/6
(x-1/2)x5/3=7/4-1/2
Bài tập 6:Tính nhanh
A) 3/4 + 2/5 + 1/4 + 3/5 =....
B) 2/3 x 3/4 x 4/5 x 5/6 =...
C) 4/5 x 3/7 + 4/5 x 4/7 =...
D) 2/5 x 7/4 - 2/5 x 3/7 =...
E) 75/100 + 18/21 + 19/32 + 1/4 +3/21 + 13/32 =....
ai lam to tick cho
Tính nhanh 5/2 x 1 + 4/1 x 11 + 3/11 x 2+1/2 x 15 + 13/15 x 4