81.(27+915):(35+332)
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=81*(27+9^15):(3^5+3^32)
\(=\dfrac{3^4\cdot\left(3^3+3^{30}\right)}{3^5+3^{32}}=\dfrac{3^7\left(1+3^{27}\right)}{3^5\left(1+3^{27}\right)}=\dfrac{3^7}{3^5}=9\)
81. (27 + 915) : ( 35 + 332)
= 81 . (33 +(32)15) :(35 + 332)
= 34 . (33 + 32.15) :(35 + 332)
= 32 .(32 . (33 + 330) :(35 + 332)
= 9 .(32 . 33 + 32 . 330) : (35 + 332)
= 9 . (35 + 332) : (35 + 332)
= 9 . 1
= 9
a) 2^7 . 9^3 / 6^5 . 8^2
= 2^7 . 3^9 / 2^5 . 3^5 . 2^6
= 2^-4 . 3^4
`@` `\text {Ans}`
`\downarrow`
`a,`
`5.125.25 \div 5^6`
`=`\(5\cdot5^3\cdot5^2\div5^6\)
`=`\(5^{1+3+2-6}=5^{6-6}=5^0=1\)
`b,`
\(2^{14}\div\left(2^6\cdot32\right)\)
`=`\(2^{14}\div\left(2^6\cdot2^5\right)\)
`=`\(2^{14}\div2^{11}=2^3\)
`c,`
`3.3^5\div 27`
`=`\(3\cdot3^5\div3^3\)
`=`\(3^{1+5-3}\)
`=`\(3^3\)
`d,`
\(2^{15}\div\left(2^6\cdot32\right)=2^{15}\div\left(2^6\cdot2^5\right)=2^{15}\div2^{11}=2^4\)
`e,`
\(3^2\cdot27\div81=3^2\cdot3^3\div3^4=3\)
`g,`
\(100\cdot1000\cdot10000-10^9=10^2\cdot10^3\cdot10^4-10^9\)
`=`\(10^9-10^9=0\)
`h,`
\(125^4\div5^9=\left(5^3\right)^4\div5^9=5^{12}\div5^9=5^3\)
\(81\cdot\left(27+9^{15}\right):\left(3^5+3^{32}\right)\)
\(=\left(3^4\cdot3^3+3^4\cdot3^{30}\right):\left(3^5+3^{32}\right)\)
\(=\dfrac{3^7+3^{34}}{3^5+3^{32}}\)
\(=\dfrac{3^2\left(3^5+3^{32}\right)}{3^5+3^{32}}=9\)