đề yêu câu ftinhs hay tính nhanh Đoàn Đức Hiếu cho nhok cày GP nè

a) \(\left(\dfrac{2}{3}\right)^3.\left(\dfrac{-3}{4}^2\right).\left(-1\right)^5\)

\(=\dfrac{8}{27}.\dfrac{9}{16}.\left(-1\right)\)

\(=\dfrac{1}{6}.\left(-1\right)\)

=\(\dfrac{-1}{6}\)

b) \(\left(\dfrac{2}{5}\right)^2.\left(\dfrac{-5}{12}\right)^2\)

\(=\dfrac{4}{25}.\dfrac{25}{144}\)

\(=\dfrac{1}{36}\)

=80-(130-64)

=80-66

=14

14

=80-(130-64)

=80-66

=14

lỗi mẫu=>mũ nhé

=14

\(80-\left[130-\dfrac{\left(12-4\right)}{2}\right]=80-\left(130-4\right)\)

\(=80-126-46\)

80-[130-(12-4)^2]

= 80-[130-(8)^2]

=80-[130-64]

=80-66

=14

👌👌👌

\(80-\left[130-\left(12-4\right)^2\right]\)

\(=80-\left[130-8^2\right]\)

\(=80-\left[130-64\right]\)

\(=80-66=14\)

14

80 - [ 130 - ( 12 -  4 ) ^ 2 

= 80 - [ 130 - 8^2 ]

= 80 - [ 130 - 64 ]

= 80 - 66 = 14

Bạn chọn xem cái này nhé!

14 ban nhe 

80 – [130 – (12 - 4)2] = 80 – [130 – 82]

= 80 – [130 - 64] = 80 - 66 = 14

{80-[130-(12-4^2)]}:2

={80-[130-(12-16)]}:2

={80-[130-(-4)]}:2

={80-134}:2

=-54:2

=-27

80-[130-(12-4)^2]

=80-[130-8²]

=80-[130-64]

=80-66

=14

\(a,=2^3\left(17-14\right)=2^3\cdot3=24\\ b,=80-\left(130-8^2\right)=80-\left(130-64\right)=80-66=14\)