Đáp án
`{4^6. 9^5+6^9. 120}/{8^4. 3^{12}-6^{11}}=4/5.`
`4^3. 4-6^3:(-6)^2=250.`
Giải thích các đáp án:
`{4^6. 9^5+6^9. 120}/{8^4. 3^{12}-6^{11}}`
`={(2^2)^6. (3^2)^5 + (2.3)^9. 3.2^3. 5}/{(2^3)^4. 3^{12}-(2.3)^{11}}`
`={2^{12}. 3^10 + 2^9 . 3^9 . 3. 2^3 . 5}/{2^{12}. 3^{12}-2^{11}.3^{11}}`
`={2^{12}. 3^10 + 2^{12} . 3^{10} .5 }/{2^{12}. 3^{12}-2^{11}.3^{11}}`
`={2^{12} . 3^{10}. (1+5)}/{2^{11}. 3^{11}.(6-1)}`
`={2.6}/{3.5}`
`={12}/{15}=4/5.`
`4^3. 4-6^3:(-6)^2`
`=4^{3+1}-6^3:6^2`
`=4^4 - 6^{3-2}`
`=256-6^1`
`=256-6`
`=250.`
