Question

помогите пожалуйста!!

Answer 1

1.

а)

$2\frac{2}{9} +\frac{1}{3} =\frac{20}{9} +\frac{1}{3}=\frac{20}{9} +\frac{3}{9} =\frac{23}{9} =2\frac{5}{9}$

б)

$5\frac{1}{5} +\frac{2}{4} =\frac{26}{5} +\frac{2}{4} =\frac{104}{20} +\frac{10}{20} =\frac{114}{20} =\frac{57}{10}$

в)

$2\frac{1}{6} +1\frac{2}{3} =\frac{13}{6} +\frac{5}{3} =\frac{13}{6} +\frac{10}{6} =\frac{23}{6} =3\frac{5}{6}$

г)

$3\frac{3}{4} +2\frac{1}{12} =\frac{15}{4} +\frac{25}{12} =\frac{45}{12} +\frac{25}{12} =\frac{70}{12} =\frac{35}{6} =5\frac{5}{6}$

2.

1 км= 1000 м

а)

$1\frac{2}{5} =\frac{7}{5} =\frac{14}{10} =1,4$

1,4 км=1400 м

б)

$5\frac{3}{10} =\frac{53}{10} =5,3$

5.3 км=5300м

1.

а)

$1\frac{1}{8} +\frac{3}{4} =\frac{9}{8} +\frac{3}{4} =\frac{9}{8} +\frac{6}{8} =\frac{15}{8} =1\frac{7}{8}$

б)

$4\frac{1}{6} +\frac{2}{5} =\frac{25}{6} +\frac{2}{5} =\frac{125}{30} +\frac{12}{30} =\frac{137}{30} =4\frac{17}{30}$

в)

$3\frac{2}{5} +1\frac{1}{10} =\frac{17}{5} +\frac{11}{10} =\frac{34}{10} +\frac{11}{10} =\frac{45}{10} =4\frac{1}{2}$

г)

$3\frac{1}{3} +5\frac{5}{18} =\frac{10}{3} +\frac{95}{18} =\frac{60}{18} +\frac{95}{18} =\frac{155}{18} =8\frac{11}{18}$

2.

а)

$1\frac{1}{10} =\frac{11}{10} =1.1$

1.1 км=1100 м

б)

$3\frac{3}{5} =\frac{18}{5} =\frac{36}{10} =3,6$

3,6 км=3600м