=(75.5⁴+175.5⁴):(20.25.125-625.75)

=(75.625+175.625):(62500-46875)

=(48675+109375):15625

=158050:15620

=10,1184379

(75.5⁴+175.5⁴):(20.25.125-625.75)= (75.625+175.625):(62500-46875)

                                                        = 156250:15625= 10

\(\frac{75.5^4+175.5^4}{20.25.125+625.75}\)

=\(\frac{3.25.5.125+7.25.625}{4.5.25.125+625.3.25}\)

=\(\frac{3+7}{4+3}\)

=\(\frac{10}{7}\)

a) \(\left(20.2,4+12.2,4-48.2,4\right):2\)

\(=\left[2^4.\left(20+12-48\right)\right]:2=2^4.\left(-16\right):2=\left(2^4:2\right).\left(-16\right)=8.\left(-16\right)=-128\)

b)\(\left(75.5^4+175.5^4\right):\left(20.25.125-625.75\right)\)

\(=\left[5^4.\left(75+175\right)\right]:\left[5.\left(4.5.25-125.15\right)\right]\)

...............

c)\(100-\left(75-3^2\right)=100-75+9=34\)

chúc cậu học tốt:) 

nếu được thì làm quen ạ<3

34/35

= [(75 + 175).\(5^4\)] : (20.5.5.125 - 625.75)

= (250.625): ( 100. 625 - 625.75) 

= (250.625): [(100 - 75).625]

= 250.625 : 25.625

= (250:25).625

= 10.625

= 6250

\(\frac{75.5^4+175.5^4}{20.25.125-625.75}=\frac{5^2.3.5^4+5^2.5^4.7}{4.5^2.5^3.5-5^4.5^2.3}=\frac{5^6\left(3+7\right)}{5^6\left(4-3\right)}=\frac{10}{1}=10\)