А) 3/5 + 5/16 б) 2/7 + 5/28 в) 4/7 + 3/14 г) 7/100 + 3/10

а) [latex] \frac{3}{5 } + \frac{5}{16} = \frac{3*5}{5*16} + \frac{5*5}{16*5} = \frac{48}{80} + \frac{25}{80} = \frac{73}{80} [/latex] б) [latex] \frac{2}{7} + \frac{5}{28} = \frac{2*4}{7*4} + \frac{5}{28}= \frac{8}{28} + \frac{5}{28}= \frac{13}{28} [/latex] в)[latex] \frac{4}{7} + \frac{3}{14} = \frac{4*2}{7*2} + \frac{3}{14} = \frac{8}{14} + \frac{3}{14} = \frac{11}{14} [/latex] г) [latex] \frac{7}{100} + \frac{3}{10} = \frac{3*10}{10*10} = \frac{7}{100} + \frac{30}{100} = \frac{37}{100} [/latex]

а). 3/5+5/16=48/80+25/80=73/80 б) 2/7+5/28=8/28+5/28=13/28 в) 4/7+3/14=8/14+3/14=11/14 г) 7/100+3/10=7/100+30/100=37/100