(1,0 điểm) Tính hợp lí biểu thức sau: a) 1024 : ( − 2 ) 6 + 160 : ( − 3 3 − 53 ) − 9 0 ⋅ 9 1 . b) 121 ⋅ ( − 63 ) + 63 ⋅ ( − 53 ) − 63 ⋅ 26.

a) \(1024:{\left( { - 2} \right)^6} + 160:\left( { - {3^3} - 53} \right) - {9^0} \cdot {9^1}\)

\( = {2^{10}}:{2^6} + 160:\left( { - 27 - 53} \right) - 9\)

\( = {2^4} + 160:\left( { - 80} \right) - 9\)

\( = 16 + \left( { - 2} \right) - 9\)

\( = 5.\)

b) \(121 \cdot \left( { - 63} \right) + 63 \cdot \left( { - 53} \right) - 63 \cdot 26\)

\[ = \left( { - 121} \right) \cdot 63 + 63 \cdot \left( { - 53} \right) - 63 \cdot 26\]

\[ = 63 \cdot \left[ {\left( { - 121} \right) + \left( { - 53} \right) - 26} \right]\]

\[ = 63 \cdot \left( { - 200} \right)\]

\( = - 12\,\,600.\)