\(\left(20.2^4-12.2^3-48.2^2\right)^2:\left(-8\right)^3\)
Tính hợp lí :
a,\(\left(20.2^4-12.2^3-48.2^2\right)^2:\left(-8\right)^3\)
b,\(\frac{5.4^{15}-9^9-4.3^{20}.8^9}{5.2^9.6^{19}-7.2^9.27}\)
Giúp mik mik sẽ cho 3 tick ,Thanks !
a, \(\left[2^3.9^4+9^3.45\right]:\left[9^2.10-9^2\right]\)
b, \(\left[20.2^4+12.2^4-48.2^2\right]:8^2\)
(20.2^4 - 12.2^3 - 48.2^2)^2 : (-8)^3
( 20.2^4+12.2^4-48.2^2):8^2
(2^4.<20+12>-48.2^2):8^2
=(2^4.32-192):8^2
=320:8^2
=5
(20.2^4+12.2^4-48.2^2):8^4
Tính:
a) (-1).(-2)-(3).(-4)-(-2).(-3)
b) (-2).(-3):(-1)-(-3).(-2):(-6)+(-2)
c) (20.2^4 - 12.2^3 - 48.2^2)^2:(-8)^3
Tính:
a) (-1).(-2)-(3).(-4)-(-2).(-3)
b) (-2).(-3):(-1)-(-3).(-2):(-6)+(-2)
c) (20.2^4 - 12.2^3 - 48.2^2)^2:(-8)^3
a) (-1).(-2)-(-3).(-4)-(-2).(-3)
=(-2)-(-12)-(-6)
=10-(-6)
=10+6
=16
b) (-2).(-30):(-1)-(-3).(-2):(-6)+(-2)
=6:(-1)-6:(-6)+(-2)
= (-6)-(-1)+(-2)
=(-5)+(-2)
= -7
c) (20.2^4-12.2^3-48.2^2)^2:(-8)^3
=(20.16-12.8-48.4)^2:(-8)^3
=(320-96-192)^2:(-8)^3
=(224-192)^2:(-8)^3
=(32)^2:(-8)^3
=1024:(-521)
= -2
(20.24+12.24-48.22):82=
\(\left(20.2^4+12.2^4-48.2^2\right):8^2=\left(20.2^4+12.2^4-12.2^2.2^2\right):8\)
\(=\left(20.2^4+12.2^4-12.2^4\right):2^6=2^4.\left(20+12-12\right):2^6\)
\(=2^4.20:2^6=2^4.2^2.5:2^6=2^6.5:2^6=5\)
(20.2 mũ 4+12.2 mũ 4-48.2 mũ 2) : 8 mũ 2
\(\Rightarrow\)(20.16+12x16-48.4):64=(16.(20+12)-192):64=(16.32-192):64=320:64=5
mình có cách ngắn hơn nhưng khó hiểu lắm nên tích đúng cho mình nha