a)
[tex]2 \frac{3}{4} + 4 \frac{1}{5} = 2 \frac{15}{20} + 4 \frac{4}{20} = 6 \frac{19}{20} [/tex]
[tex]6 \frac{4}{5} - 2 \frac{1}{2} = 6 \frac{8}{10} - 2 \frac{5}{10} = 4 \frac{3}{10} [/tex]
b) W załączniku odpowiedź
c)
[tex]5.25 \times 100 = 525[/tex]
[tex]12.16 \div 0.4 = 12 \frac{16}{100} \div \frac{4}{10} = \frac{1216}{100} \times \frac{10}{4} = \frac{304}{10} \times \frac{1}{1} = \frac{304}{10} = 30.4[/tex]
[tex]0.3 \times 10 = 3[/tex]
Myślę że pomogłem ;)
