Ответ:
- \(\frac{5}{8}-\frac{4}{5}=\frac{25-32}{40}=-\frac{7}{40}\).
- \(\frac{1}{\frac{1}{18}-\frac{1}{21}}=\frac{1}{\frac{1}{126}}=126\).
- \(0{,}2:(1-\frac{1}{3})=0{,}2:\frac{2}{3}=0{,}3\).
- \((1{,}7+3{,}8):2{,}2=5{,}5:2{,}2=2{,}5\).
- \(21:(0{,}6\cdot2{,}8)=21:1{,}68=12{,}5\).
- \(\frac{(2\cdot3)^5}{2^4\cdot3^3}=2^{5-4}\cdot3^{5-3}=18\).
- \(\frac{15^8}{3^6\cdot5^7}=3^2\cdot5=45\).
- \(2^5:4=32:4=8\).
- \(5^{-3-9-(-14)}=5^2=25\).
- \(2^{-9+14}=2^5=32\).
- \((\frac{17}{26}+\frac{22}{26})\cdot\frac{17}{6}=\frac{3}{2}\cdot\frac{17}{6}=\frac{17}{4}\).
- \((\frac{5}{6}+\frac{1}{10})\cdot24=\frac{14}{15}\cdot24=\frac{112}{5}=22{,}4\).
- \(5{,}4\cdot1{,}9-2{,}15=10{,}26-2{,}15=8{,}11\).
- \(18\cdot\frac{1}{81}-\frac{20}{9}=\frac{2}{9}-\frac{20}{9}=-2\).
- \(-\frac{7}{18}\cdot0{,}9+3=-0{,}35+3=2{,}65\).
- \(0{,}6\cdot(-1000)+50=-550\).
- \(0{,}4\cdot(-216)+0{,}7\cdot36+49=-86{,}4+25{,}2+49=-12{,}2\).
- \(0{,}4+0{,}09+0{,}0001=0{,}4901\).
