Rút gọn
A ,__990__ b, __374__
2110 504
C , _-102_ d ,__2^4.2^3__
85 6^2 .5
E , _-22_ m , _-72_
55 64
Rút gọn
A ,__990__ b, __374__
2110 504
C , _-102_ d ,__2^4.2^3__
85 6^2 .5
E , _-22_ m , _-72_
55 64
Đáp án:
`a)` `990/2110 = (990 : 10)/(2110 : 10) = 99/211`
`b)` `374/504 = (374 : 2)/(504 : 2) = 187/252`
`c)` `(-102)/85 = (-102 : 17)/(85 : 17) = (-6)/5`
`d)` ` (2^4 . 2^3)/(6^2 . 5) = (16 . 8)/(36 . 5) = 128/180 = (128 : 4)/(180 : 4) = 32/45`
`e)` `(-22)/55 = (-22 : 11)/(55 : 11) = (-2)/5`
`m)` `(-72)/64 = (-72 : 8)/(64 : 8) = (-9)/8`
Xin hay nhất!
Đáp án:
`a) 990/2110 = 99/211`
`b) 374/504 = 187/252`
`c) (-102)/85 = (-6)/5`
`d) (2^4 . 2^3)/(6^2 . 5) = 2^7/( (2 . 3)^2 . 5) = 2^7/(2^2 . 3^2 . 5) = 2^5/(1 . 9 . 5) = 32/45`
`e) (-22)/55 = (-2)/5`
`m) (-72)/64 = (-9)/8`