[15 + (1.27 -8)]: (-17)
= [15 + (27 -8)]: (-17)
= [15 + 19]:(-17)
= 34 :(-17)
= -2
[15 + (1.27 -8)]: (-17)
= [15 + (27 -8)]: (-17)
= [15 + 19]:(-17)
= 34 :(-17)
= -2
x³ =125
4⁵:4³=
8¹² . 8³ : 8¹⁵=
7¹⁵ : 7¹³=
17¹⁵. 17¹⁰: 17²²=
5¹⁰ . 25 : 5¹¹=
15¹⁰ .225 : 15¹¹=
giúp mình bài này nha
-16:(-8)+5[3-15:5+2(-3+4)]
15*(-236)+15*235
237*(-28)+28*137
(-3)*(-17)+3*(120-17)
(-8)*72+8*(-19)-(-8)
Hãy so sánh 2 phân số sau:
\(\frac{15^{30}+16^{12}+17^{50}-16^8}{17^{30}+16^8+15^{50}-16^{12}}\)
\(\frac{17^{30}+16^8+15^{50}-16^{12}}{15^{30}+16^{12}+17^{50}-16^8}\)
tính hợp lí :(8/23+3/19-15/17)-(2/17-15/23)
tính hợp lí :(8/23+3/19-15/17)-(2/17-15/23)
Tính nhanh
a)47/53x(17/3-53/47)+17/3x(6/17-47/53)
b)15/37x(38/41-75/45)-38/41x(15/37-82/76)
c)-41/32x(15/8-16/41)+15/8x(41/32-8/3)
Tìm x nha
Giấu《 là dấu < hoặc bằng
1)-8/3+-1/3<x<-2/7+-5/7
2)8/17+5/17<×/17<10/17+5/17
8)-5/6+8/3+-29/6《x《-1/2+2+5/2
9)-8/11+2/11+13/11《x《8/15+9/15-2/15+2
7)×/5=-5/16+3/4-1/2
12/17 . 9/13 - 7/15 . 6/13 +5/17 . 9/13 - 8/15 . 6/13
tính: 1.27+2.77+4.27+5.77+7.27+...+13.27+14.77 =?