Question

956 есеп 5 сынып пж пж помогите пожалуйста

Answer 1

Ответ:

$1)(3 - 3.8 \div 5 \frac{2}{11} ) \times \frac{3}{17} + (18 - 8 \frac{2}{3} ) \div 1 \frac{1}{6} = (3 - \frac{19}{5} \times \frac{11}{57} )\times \frac{3}{17} + (18 - \frac{26}{3} ) \times \frac{6}{7} = (3 - \frac{11}{15} ) \times \frac{3}{17} + \frac{28}{3} \times \frac{6}{7} = \frac{34}{15} \times \frac{3}{17} + 8 = \frac{2}{5} + 8 = 0.4 + 8 = 8.4$

$2)(13 \frac{2}{7} \div \frac{31}{70} - 28.5) \div 6.75 + 20\frac{2}{3} - 19 \frac{9}{10} = ( \frac{93}{7} \times \frac{70}{31} - 28.5) \div 6.75 + \frac{62}{3} - \frac{199}{10} = (30 - 28.5) \div 6.75 + \frac{23}{30} = 1.5 \div 6.75 + \frac{23}{30} = \frac{3}{2} \times \frac{4}{27} + \frac{23}{30} = \frac{2}{9} + \frac{23}{30} = \frac{89}{90}$