Question

ввчислите,и получите 30 баллов.​

Answer 1

Ответ:

все решения на фотографиях

Answer 2

Ответ:

$(4 \frac{3}{4} - 2) \div \frac{33}{2} + 1 \frac{6}{11} \frac{17}{8} \\ 1) \: \: \: \: 4 \frac{3}{4} - 2 = 2 \frac{3}{4} \\ 2) \: \: \: \: 2 \frac{3}{4} \div \frac{33}{2} = \frac{11 \times 2}{4 \times 33} = \frac{1}{6} \\ 3) \: \: \: \:1 \frac{6}{11} \div \frac{17}{8} = \frac{17 \times 8}{11 \times 17} = \frac{8}{11} \\ 4) \: \: \: \: \frac{1}{6} + \frac{8}{11} = \frac{11 + 48}{66} = \frac{59}{66}$

$(3 \frac{1}{7} \times ( - 8) - 2.9 \div 0.1 + \frac{11}{21} \div ( - 3 \frac{2}{3} \\ 1) \: \: \: \: \: - 3 \frac{1}{7} \times ( - 8) = \frac{22}{7} \times \frac{8}{1} = \frac{176}{7} \\ 2) \: \: \: \: 2.9 \div 0.1 = 29 \div 1 = 29 \\ 3) \: \: \: \: \frac{11}{21} \div ( - 3 \frac{2}{3} ) = - ( \frac{11}{21} \div \frac{11}{3} ) = - \frac{11 \times 3}{21 \times 11} = - \frac{1}{7} \\ 4) \: \: \: \frac{176}{7} - 29 = \frac{176}{7} - \frac{203}{7} = - \frac{27}{7} = - 3 \frac{6}{7} \\ 5) \: \: \: \: \: - \frac{27}{7} + ( - \frac{1}{7} ) = \frac{27 + 1}{7} = - 4$