Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
Ta có:
\(X=\frac{-19}{23}=-1+\frac{4}{23}\)
\(Y=\frac{-25}{29}=-1+\frac{4}{29}\)
Mà \(\frac{4}{23}>\frac{4}{29}\Rightarrow X>Y\)
Vậy \(X>Y\)
`@` `\text {Ans}`
`\downarrow`
`a)`
`-(-18 + 45) - (18 + 55)`
`= 18 - 45 - 18 - 55`
`= (18 - 18) - (45 + 55)`
`= -100`
`b)`
`24. (5 - 178) + 178 . (10 + 24)`
`= 24.5 - 24.178 + 178. 10 + 178. 24`
`= 24.5 + 178.(-24 + 10 + 24)`
`= 24.5 + 178.10`
`=120 + 1780`
`=``1900`
`c)`
`29.(-101)`
`= -2929`
`d)`
\((- 56 + 130) – (43 – 56) – (- 20 – 43)\)
`= -56 + 130 - 43 + 56 + 20 + 43`
`= (56 - 56) + (130 + 20) + (-43+43)`
`= 150`
a) (-37) + 14 + 26 + 37
= [(-37) + 37] + (14 + 26)
= 0 + 40 = 40
b) (-24) + 6 + 10 + 24
= [(-24) + 24] + (10 + 6)
= 0 + 16 = 16
c) 15 + 23 + (-25) + (-23)
= [15 + (-25)] + [23 + (-23)]
= (-10) + 0 = -10
d) 60 + 33 + (-50) + (-33)
= [60 + (-50)] + [33 + (-33)]
= 10 + 0 = 10
e) (-16) + (-209) + (-14) + 209
= [(-16) + (-14)] + [(-209) + 209]
= (-30) + 0 = -30
f) \(-3^2+\left(-54\right)\div\left[\left(-2\right)^8+7\right]\times\left(-2\right)^2\\ =\left(-9\right)+\left(-54\right)\div263\times4\\ =\left(-9\right)+\dfrac{-216}{263}=\dfrac{-2583}{263}\)
a. \(\left[\left(-37\right)+37\right]+\left(14+16\right)\) = 30
B. \(\left[\left(-24\right)+24\right]+\left(10+6\right)\) = 16
C. \(\left[\left(-23\right)+23\right]+\left(15-23\right)\)= -8
d. \(\left[33-33\right]+\left(60-50\right)\) = 10
e. \(\left(209-209\right)+\left(-16-14\right)\)= -30
2550 = ( 52 )50 = 5100
2300 = 23*100 = ( 23 )100 = 8100
Vì 5 < 8 nên 5100 < 8100 hay 2550 < 2300
Ta có: 25 ^ 50 = (5 ^ 2) ^ 50 = 5 ^ 100 < 8 ^ 100 = (2 ^ 3) ^ 100 = 2 ^ 300
a) x = \(\dfrac{24}{-54}\) = \(\dfrac{-4}{9}\) = \(\dfrac{-20}{45}\)
y = \(\dfrac{-33}{55}\) = \(\dfrac{-3}{5}\) = \(\dfrac{-27}{45}\)
Vì \(\dfrac{-20}{45}\) > \(\dfrac{-27}{45}\) ⇒ \(\dfrac{24}{-54}\) > \(\dfrac{-33}{55}\) ⇒ x > y
b) x = \(\dfrac{-19}{23}\) = \(\dfrac{4}{23}\) - 1
y = \(\dfrac{-25}{29}\) = \(\dfrac{4}{29}\) - 1
Vì \(\dfrac{4}{23}\) > \(\dfrac{4}{29}\) ⇒ \(\dfrac{4}{23}\) - 1 > \(\dfrac{4}{29}\) - 1 ⇒ \(\dfrac{-19}{23}\) > \(\dfrac{-25}{29}\) ⇒ x > y