Szczegółowe wyjaśnienie:
a)
[tex] \frac{ \frac{17}{40} - 0.2 }{1 \frac{3}{5} } = \frac{ \frac{17}{40} - \frac{1}{5} }{ \frac{8}{5} } = \frac{ \frac{17}{40} - \frac{8}{40} }{ \frac{8}{5} } = \frac{ \frac{9}{40} }{ \frac{8}{5} } = \frac{9}{40} \times \frac{5}{8} = \frac{9}{8} \times \frac{1}{8} = \frac{9}{64} [/tex]
d)
[tex] \frac{ \frac{3}{7} \times 3.5 }{4.5 \div (2.75 - 0.25)} = \frac{ \frac{3}{7} \times \frac{7}{2} }{4.5 \div 2.5} = \frac{ \frac{3}{2} }{1.8} = \frac{ \frac{3}{2} }{ \frac{9}{5} } = \frac{3}{2} \times \frac{5}{9} = \frac{1}{2} \times \frac{5}{3} = \frac{5}{6} [/tex]
c) 4 3/8 // 1 5/8 -0,75 = 35/8 // 13/8 - 3/4 = 35/8 // 13/8 - 6/8 = 35/8 // 7/8 = 35/8 × 8/7 = 5 × 1 = 5
