(20.2^4+12.2^4-48.2^2):8^4
( 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 - 12.2^3 - 48.2^2)^2 : (-8)^3
(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
a,(20.2^4 + 12.2^4 - 48.2^2) ÷ 8^2
b,(75.5^4 + 175.5^4) ÷ (20.25125 + 625.75)
Thực hiện phép tính:
(20.2^4+12.2^4-48.2^2):8^2
(75.5^4+175.5^4):(20.25.125-625.75)
(20.24+12.24_48.22)÷82
(20.24+12.24_48.22)÷82
=(20.16+12.16-48.4)÷64
={[16.(20+12)]-48.4}÷64
=(16.32-48.4)÷64
=(512-192)÷64=320÷64=5
(20.24+12.24_48.22)÷82
= (20.16 + 12.16-48.4):82
= 156: 82
=156:64
=2,4375
Thực hiện phép tính:
(20.24+12.24- 48.22):82
(20 . 2^4 + 12 . 2^4 - 48 . 2^2) : 8^2
= (20 . 16 + 12 . 16 - 48 . 4) : 64
= (16 . (20 + 12) - 48 . 4) : 64
= (16 . 32 - 48 . 4) : 64
= (512 - 192) : 64
= 320 : 64
= 5
\(\left(20.2^4-12.2^3-48.2^2\right)^2:\left(-8\right)^3\)
\(\left(20.2^4-12.2^3-48.2^2\right)^2:\left(-8^3\right)\)
\(=\left(20.16-12.8-48.4\right)^2:\left(-512\right)\)
\(=\left(320-96-192\right)^2:\left(-512\right)\)
\(=\left(224-192\right)^2:\left(-512\right)\)
\(=32^2:\left(-512\right)\)
\(=\left(32^2:-512\right)\)
\(=\left(1024:-512\right)\)
\(=-2\)
=-2 (âm hai)
mình nghĩ là nó đúng
k mình nha