Question

Помогите пожалуйста решить.

Answer 1

1)
$3 - \frac{2}{5} \times 3 \frac{1}{3} = 3 - \frac{2}{5} \times \frac{10}{3} = 3 - \frac{2 \times 2}{1 \times 3} = 3 - \frac{4}{3} = \frac{9}{3} - \frac{4}{3} = \frac{5}{3} = 1 \frac{2}{3}$
2)
$\frac{7}{8} \times 2 \frac{2}{3} + ( - \frac{5}{6} ) \div 2 \frac{1}{7} = \frac{7}{8} \times \frac{8}{3} + ( - \frac{5}{6} ) \div \frac{15}{7} = \frac{7}{3} - \frac{5}{6} \times \frac{7}{15} = \frac{7}{3} - \frac{1 \times 7}{6 \times 3} = \frac{7}{3} - \frac{7}{18} = \frac{42}{18} - \frac{7}{18} = \frac{35}{18} = 1 \frac{17}{18}$
5)
3 2/11 * (6 - 13 2/11) + 13 2/11 *(3 2/11 - 6) = 3 2/11 * 6 - 3 2/11 * 13 2/11 + 13 2/11 * 3 2/11 - 13 2/11 * 6 = 3 2/11 * 6 - 13 2/11 * 6 = 6*(3 2/11 - 13 2/11) = 6*(-10) = -60

Answer 2

3 - 2/5 * 3 1/3=1 2/3

1) 2/5 * 3 1/3=2/5 * 10/3=4/3=1 1/3

2) 3 - 1 1/3=2 3/3 - 1 1/3=1 2/3

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3. .....................................=1 17/18

1) 7/8 * 2 2/3=7/8 * 8/3=7/3=2 1/3

2) - 5/6 : 2 1/7= - 5/6 : 15/7= - 5/6 * 7/15= - 7/18

3) 2 1/3+( -7/18)=2 6/18 - 7/18=1 24/18 - 7/18=1 17/18

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5. ...............................=3 2/11 * 6 - 3 2/11 * 13 2/11 - 13 2/11 * 6 + 13 2/11 * 3 2/11=3 2/11 * 6 - 13 2/11 * 6=6 * (3 2/11 - 13 2/11)= -6 * 10= - 60