Odpowiedź:
[tex]-2,3+0,12=-2,18\\\\\frac{4}{5}+\frac{1}{3}=\frac{12}{15}+\frac{5}{15}=\frac{17}{15}=1\frac{2}{15}\\\\5*\frac{2}{10}=\frac{10}{10}=1\\\\2\frac{3}{4}-\frac{1}{2}=2\frac{3}{4}-\frac{2}{4}=2\frac{1}{4}\\\\4:\frac{2}{7}=\not4^2*\frac{7}{\not2_{1}}=2*7=14\\\\\frac{3}{\not8_{4}}*\not6^3=\frac{9}{4}=2\frac{1}{4}\\\\12*1,4=16,8\\\\24,6:0,4=246:4=61,5\\\\10-5,8=4,2\\\\\dfrac{3+5}{\frac{1}{4}}=\dfrac{8}{\frac{1}{4}}=8:\frac{1}{4}=8*4=32[/tex]
