Question

Помогите пожалуйста,нужно срочно решить

Answer 1

1 вариант
▪1.

а)
$frac{29}{6} = 4 frac{5}{6}$
б)
$frac{17}{8} = 2 frac{1}{8}$
в)
$frac{40}{7} = 5 frac{5}{7}$
г)
$frac{15}{5} = 3$
д)
$frac{40}{8} = 5$
▪2.

$2 frac{1}{3} = frac{7}{3}$
$5 frac{5}{6} = frac{35}{6}$
$6 frac{7}{8} = frac{55}{8}$
$5 = frac{5}{1}$
$8 frac{3}{7} = frac{59}{7}$

▪3.

$frac{9}{12} = frac{3}{4}$
$frac{30}{42} = frac{5}{7}$
$frac{5}{90} = frac{1}{18}$
$frac{35}{49} = frac{5}{7}$
$frac{81}{108} = frac{3}{4}$

▪4.

$frac{4}{15} + frac{3}{5} = frac{4 + 9}{15} = frac{13}{15}$
$frac{3}{8} + frac{7}{20} = frac{15 + 14}{40} = frac{29}{40}$
$frac{3}{16} + frac{1}{24} = frac{9 + 2}{48} = frac{11}{48}$
$1 frac{9}{14} + 2 frac{1}{7} = 3 frac{9 + 2}{14} = 3 frac{11}{14}$
$1 frac{5}{8} + 2 frac{9}{16} = 3 frac{10 + 9}{16} = 3 frac{19}{16} = 4 frac{3}{16}$

▪5.

$frac{7}{10} - frac{1}{2} = frac{7 - 5}{10} = frac{2}{10} = frac{1}{5}$
$frac{13}{20} - frac{3}{8} = frac{26 - 15}{40} = frac{11}{40}$
$frac{13}{14} - frac{5}{42} = frac{39 - 5}{42} = frac{34}{42} = frac{17}{21}$
$3 frac{1}{6} - 2 frac{1}{12} = 1 frac{2 - 1}{12} = 1 frac{1}{12}$
$5 frac{1}{14} - 3 frac{2}{7} = 2 frac{1 - 4}{14} = 2 - frac{3}{14} = 1 frac{14 - 3}{14} = 1 frac{11}{14}$

▪6.

$frac{2}{3} times frac{1}{4} = frac{1}{3 times 2} = frac{1}{6}$
$frac{2}{5} times frac{15}{16} = frac{3}{8}$
$1 frac{1}{6} times frac{6}{7} = frac{7 times 6}{6 times 7} = 1$
$frac{5}{8} times 1 frac{3}{7} = frac{5 times 10}{8 times 7} = frac{5 times 5}{4 times 7} = frac{25}{28}$
$3 frac{3}{7} times 1 frac{1}{6} = frac{24 times 7}{7 times 6} = frac{4}{1} = 4$

▪7.

$frac{3}{14} div frac{2}{7} = frac{3 times 7}{14 times 2} = frac{3}{4}$
$frac{7}{12} div frac{1}{3} = frac{7 times 3}{12 times 1} = frac{7}{4} = 1 frac{3}{4}$
$frac{3}{4} div 1 frac{7}{8} = frac{3}{4} div frac{15}{8} = frac{3 times 8}{4 times 15} = frac{2}{5}$
$1 frac{1}{2} div frac{3}{5} = frac{3 times 5}{2 times 3} = frac{5}{2} = 2 frac{1}{2}$
$2 frac{2}{3} div 1 frac{1}{3} = frac{8}{3} div frac{4}{3} = frac{8 times 3}{3 times 4} = 2$

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