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а)
![3 div 1 frac{1}{2} + 5 div 1 frac{1}{4} = 3 div frac{3}{2} + 5 div frac{5}{4} = 3 times frac{2}{3} + 5 times frac{4}{5} = 2 + 4 = 6 3 div 1 frac{1}{2} + 5 div 1 frac{1}{4} = 3 div frac{3}{2} + 5 div frac{5}{4} = 3 times frac{2}{3} + 5 times frac{4}{5} = 2 + 4 = 6](https://tex.z-dn.net/?f=3+div+1+frac%7B1%7D%7B2%7D++%2B+5+div+1+frac%7B1%7D%7B4%7D++%3D+3+div++frac%7B3%7D%7B2%7D++%2B+5+div++frac%7B5%7D%7B4%7D++%3D+3+times++frac%7B2%7D%7B3%7D++%2B+5+times++frac%7B4%7D%7B5%7D++%3D+2+%2B+4+%3D+6)
б)
![10 frac{2}{3} - 5 frac{1}{3} div 3 frac{1}{5} = 10 frac{2}{3} - frac{16}{3} div frac{16}{5} = 10 frac{2}{3} - frac{16}{ 3} times frac{5}{16} = 10 frac{2}{3} - frac{5}{3} = 10 frac{2}{3} - 1 frac{2}{3} = 9 10 frac{2}{3} - 5 frac{1}{3} div 3 frac{1}{5} = 10 frac{2}{3} - frac{16}{3} div frac{16}{5} = 10 frac{2}{3} - frac{16}{ 3} times frac{5}{16} = 10 frac{2}{3} - frac{5}{3} = 10 frac{2}{3} - 1 frac{2}{3} = 9](https://tex.z-dn.net/?f=10+frac%7B2%7D%7B3%7D++-+5+frac%7B1%7D%7B3%7D++div+3+frac%7B1%7D%7B5%7D++%3D+10+frac%7B2%7D%7B3%7D++-++frac%7B16%7D%7B3%7D++div++frac%7B16%7D%7B5%7D++%3D+10+frac%7B2%7D%7B3%7D++-++frac%7B16%7D%7B+3%7D++times++frac%7B5%7D%7B16%7D++%3D+10+frac%7B2%7D%7B3%7D++-++frac%7B5%7D%7B3%7D++%3D+10+frac%7B2%7D%7B3%7D++-+1+frac%7B2%7D%7B3%7D++%3D+9)
в)
![(10 frac{2}{3} - 5 frac{1}{3} ) div 3 frac{1}{3} = 5 frac{1}{3} div 3 frac{1}{3} = frac{16}{3} div frac{10}{3} = frac{16}{3} times frac{3}{10} = frac{16}{10} = 1.6 (10 frac{2}{3} - 5 frac{1}{3} ) div 3 frac{1}{3} = 5 frac{1}{3} div 3 frac{1}{3} = frac{16}{3} div frac{10}{3} = frac{16}{3} times frac{3}{10} = frac{16}{10} = 1.6](https://tex.z-dn.net/?f=%2810+frac%7B2%7D%7B3%7D++-+5+frac%7B1%7D%7B3%7D+%29+div+3+frac%7B1%7D%7B3%7D++%3D+5+frac%7B1%7D%7B3%7D++div+3+frac%7B1%7D%7B3%7D++%3D++frac%7B16%7D%7B3%7D++div++frac%7B10%7D%7B3%7D++%3D++frac%7B16%7D%7B3%7D++times++frac%7B3%7D%7B10%7D++%3D++frac%7B16%7D%7B10%7D++%3D+1.6)
г)
![4 frac{1}{2} times frac{8}{9} - 5 frac{1}{3} div 10 frac{2}{3} = frac{9}{2} times frac{8}{9} - frac{16}{3} div frac{32}{3} = 4 - frac{16}{3} times frac{3}{32} = 4 - frac{1}{2} = 3 frac{1}{2} 4 frac{1}{2} times frac{8}{9} - 5 frac{1}{3} div 10 frac{2}{3} = frac{9}{2} times frac{8}{9} - frac{16}{3} div frac{32}{3} = 4 - frac{16}{3} times frac{3}{32} = 4 - frac{1}{2} = 3 frac{1}{2}](https://tex.z-dn.net/?f=4+frac%7B1%7D%7B2%7D++times++frac%7B8%7D%7B9%7D++-+5+frac%7B1%7D%7B3%7D++div+10+frac%7B2%7D%7B3%7D++%3D++frac%7B9%7D%7B2%7D++times++frac%7B8%7D%7B9%7D++-++frac%7B16%7D%7B3%7D++div++frac%7B32%7D%7B3%7D++%3D+4+-++frac%7B16%7D%7B3%7D++times++frac%7B3%7D%7B32%7D++%3D+4+-++frac%7B1%7D%7B2%7D++%3D+3+frac%7B1%7D%7B2%7D+)
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