Выполните действия:
а)

(1 \frac{2}{9} + 1 \frac{1}{6}) * (2 - 1 \frac{25}{42})

;
б)

(4 + 2 \frac{7}{15}) * (10 - 8 \frac{16}{23})

;
в)

(4 + 5 \frac{1}{6}) * (3 \frac{2}{3} - \frac{13}{33})

;
г)

6 \frac{5}{12} * \frac{4}{11} - 11 \frac{1}{4} * \frac{1}{9}

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Математика 6 класс Виленкин. Номер №549

(1 \frac{2}{9} + 1 \frac{1}{6}) * (2 - 1 \frac{25}{42}) = (1 \frac{4}{18} + 1 \frac{3}{18}) * (1 \frac{42}{42} - 1 \frac{25}{42}) = 2 \frac{7}{18} * \frac{17}{42} = \frac{43}{18} * \frac{17}{42} = \frac{731}{756}

(4 + 2 \frac{7}{15}) * (10 - 8 \frac{16}{23}) = 6 \frac{7}{15} * (9 \frac{23}{23} - 8 \frac{16}{23}) = 6 \frac{7}{15} * 1 \frac{7}{23} = \frac{87}{15} * \frac{30}{23} = \frac{87}{1} * \frac{2}{23} = \frac{174}{23} = 7 \frac{13}{23}

(4 + 5 \frac{1}{6}) * (3 \frac{2}{3} - \frac{13}{33}) = 9 \frac{1}{6} * (3 \frac{22}{33} - \frac{13}{33}) = \frac{55}{6} * 3 \frac{9}{33} = \frac{55}{6} * \frac{108}{33} = \frac{5}{1} * \frac{18}{3} = \frac{90}{3} = 30

6 \frac{5}{12} * \frac{4}{11} - 11 \frac{1}{4} * \frac{1}{9} = \frac{77}{12} * \frac{4}{11} - \frac{45}{4} * \frac{1}{9} = \frac{7}{3} * \frac{1}{1} - \frac{5}{4} * \frac{1}{1} = \frac{7}{3} - \frac{5}{4} = \frac{28}{12} - \frac{15}{12} = \frac{13}{12} = 1 \frac{1}{12}

ГДЗ Математика 6 класс Виленкин, Жохов, Чесноков