Вправа 241 243 помогите плис

241)
$7 ^{-2}= \frac{1}{7 ^{2} } = \frac{1}{49}$
$2 ^{-5}= \frac{1}{2 ^{5} }= \frac{1}{32}$
$4 ^{-1}= \frac{1}{4} =0,25$
$(-5) ^{-2} = \frac{1}{(-5) ^{2} } = \frac{1}{25}=0,04$
$(-6) ^{-1}= \frac{1}{-6} = - \frac{1}{6}$
$0,7 ^{0} = 1$
242)
$5*10 ^{-2} =5* \frac{1}{10 ^{2} }=5* \frac{1}{100} =0,05$
$16*2 ^{-5}=16* \frac{1}{2 ^{5} }=16* \frac{1}{32}= \frac{1}{2} =0,5$
$5 ^{-3} *25 ^{0}= \frac{1}{5 ^{3} } *1= \frac{1}{125} =0,008$
$3*2 ^{-3}=3* \frac{1}{2 ^{3} }= 3*\frac{1}{8} = \frac{3}{8}=0,375$
$2 ^{-4} +2 ^{-2}= \frac{1}{2 ^{4} } + \frac{1}{2 ^{2} }= \frac{1}{16} + \frac{1}{4}= \frac{1+4}{16}= \frac{5}{16} =0,3125$
$2 ^{-3}-2 ^{-4} = \frac{1}{2 ^{3} } - \frac{1}{2 ^{4} }= \frac{1}{8}- \frac{1}{16}= \frac{2-1}{16}= \frac{1}{16} =0,0625$
$6 ^{-1} +3*3 ^{-2} =6 ^{-1} +3 ^{-1}= \frac{1}{6} + \frac{1}{3} = \frac{1+2}{6}= \frac{3}{6} = \frac{1}{2}=0,5$
$4 ^{-1} -3 ^{-2} = \frac{1}{4}- \frac{1}{3 ^{2} } = \frac{1}{4} - \frac{1}{9} = \frac{9-4}{36}= \frac{5}{36}$