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![= ( frac{43}{10} times frac{3}{43} + frac{58}{5} times frac{9}{4} ) div frac{11}{4} = ( frac{3}{10} + frac{27 times 9}{5 times 2} ) times frac{4}{11} = ( frac{3}{10} + frac{243}{10} ) times frac{4}{11} = frac{246}{10} times frac{4}{11} = frac{123}{5} times frac{4}{11} = frac{492}{55} = ( frac{43}{10} times frac{3}{43} + frac{58}{5} times frac{9}{4} ) div frac{11}{4} = ( frac{3}{10} + frac{27 times 9}{5 times 2} ) times frac{4}{11} = ( frac{3}{10} + frac{243}{10} ) times frac{4}{11} = frac{246}{10} times frac{4}{11} = frac{123}{5} times frac{4}{11} = frac{492}{55}](https://tex.z-dn.net/?f=+%3D+%28+frac%7B43%7D%7B10%7D++times++frac%7B3%7D%7B43%7D++%2B++frac%7B58%7D%7B5%7D++times++frac%7B9%7D%7B4%7D+%29+div++frac%7B11%7D%7B4%7D++%3D+%28+frac%7B3%7D%7B10%7D++%2B++frac%7B27+times+9%7D%7B5+times+2%7D+%29+times++frac%7B4%7D%7B11%7D++%3D+%28+frac%7B3%7D%7B10%7D++%2B++frac%7B243%7D%7B10%7D+%29+times++frac%7B4%7D%7B11%7D++%3D++frac%7B246%7D%7B10%7D++times++frac%7B4%7D%7B11%7D++%3D++frac%7B123%7D%7B5%7D++times++frac%7B4%7D%7B11%7D++%3D++frac%7B492%7D%7B55%7D+)
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![( frac{3}{10} - frac{3}{20} ) times frac{3}{2} times ( frac{188}{100} + frac{53}{25} ) = (frac{6}{20} - frac{3}{20} ) times frac{3}{2} times ( frac{188}{100} + frac{212}{100} ) = frac{3}{20} times frac{3}{2} times frac{400}{100} = frac{3}{20} times 6 = frac{9}{10} = 0.9 ( frac{3}{10} - frac{3}{20} ) times frac{3}{2} times ( frac{188}{100} + frac{53}{25} ) = (frac{6}{20} - frac{3}{20} ) times frac{3}{2} times ( frac{188}{100} + frac{212}{100} ) = frac{3}{20} times frac{3}{2} times frac{400}{100} = frac{3}{20} times 6 = frac{9}{10} = 0.9](https://tex.z-dn.net/?f=%28+frac%7B3%7D%7B10%7D++-++frac%7B3%7D%7B20%7D+%29+times++frac%7B3%7D%7B2%7D++times+%28+frac%7B188%7D%7B100%7D++%2B++frac%7B53%7D%7B25%7D+%29+%3D++%28frac%7B6%7D%7B20%7D++-++frac%7B3%7D%7B20%7D+%29+times++frac%7B3%7D%7B2%7D++times+%28+frac%7B188%7D%7B100%7D++%2B++frac%7B212%7D%7B100%7D+%29+%3D++frac%7B3%7D%7B20%7D++times++frac%7B3%7D%7B2%7D++times++frac%7B400%7D%7B100%7D++%3D++frac%7B3%7D%7B20%7D++times+6+%3D++frac%7B9%7D%7B10%7D++%3D+0.9)
б)
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