Question

Tính nhanh

a) (20.2⁴+12.2⁴-48.2²):8²

b) (75.5²+175.54):(20.125-625.75)

c) (6.64.8²:(4³-2⁵.16)

NHANH MK ĐG CẦN GẤP

Answer 1

a. \(\left(20.2^4+12.2^4-48.2^2\right):8^2\)

= \(\left[2^4.\left(20+12\right)-48.4\right]:64\)

= \(\left[16.32-192\right]:64\)

= \(\left[512-192\right]:64\)

= \(320:64\)

= \(5\)

b. \(\left(75.5^2+175.54\right):\left(20.125-625.75\right)\)

= \(\left(75.25+175.54\right):\left(20.125-625.75\right)\)

= \(\left(1875+9450\right):\left(2500-46875\right)\)

= \(11325:\left(-44375\right)\)

= \(\dfrac{-453}{1775}\)

c. \(\left[6.64.8^2:\left(4^3-2^5.16\right)\right]\)

= \(\left[6.64.64:\left(64-32.16\right)\right]\)

= \(\left[24576:\left(64-512\right)\right]\)

= \(\left[24576:\left(-448\right)\right]\)

= \(\dfrac{-387}{7}\)