\(\frac{668}{15}\)-\(\frac{5}{8}\)=\(\frac{5344}{120}\)-\(\frac{75}{120}\)=\(\frac{5269}{120}\)
668/15 - 5/8 = 5344/120 - 75/120=5269/120
668/15-5/8
a) 92/9 + 13/5 - 56/9
b) 58/7 - (31/9 + 30/7)
c) 2/3 + 1/3 x 9/4 - 13/12
d) 41/8 - 7/4 : 11/5
e) 478/19 : 5/4 - 668/19 : 5/4
f) 32/21 x 49/45 : 16/22 x 15/33
g) 2020x2018+9 / 2019x2020-2011.
Giup minh voi minh dang can gap!!!
Tính 668 - ( -2011) - |-68|
tính :
136 . ( 668 - 588 ) - 404 . 25
5-5/3+5/9-5/27 15-15/11+15/121
____________ : ________________
8-8/3+8/9-8/27 16-16/11+16/121
c) \(\dfrac{8}{15}\).\(\dfrac{5}{13}\)+\(\dfrac{5}{13}\).\(\dfrac{26}{15}\).\(\dfrac{5}{13}\).\(\dfrac{8}{15}\)
/x/ = /-5/ - /-10/ + 15
/x/= -(-12) + (-15) + 8
/x/ = -8 + ( 5-9) - 5 + 8
4. Tính hợp lí :
\(\dfrac{5}{13}\) . \(\dfrac{8}{15}\) + \(\dfrac{5}{13}\) . \(\dfrac{26}{15}\) - \(\dfrac{5}{13}\) . \(\dfrac{8}{15}\)
Kết quả của phép tính -7/15 . 5/8 . 15/-7 . (-16) bằng
A.7/5 B.-10 C.5/8 D.15/-7
![[A]ȵȟ•βê•ʠǔá♡](https://hoc24.vn/images/avt/avt1063100_256by256.jpg)
