Часть 1 Задание №1 a) -4* (12-89) в) -31+12*9 д) -69+96:6 ж)-78: (53-47) и) 29-16 * (-4) б)-3* (24-117) г) -43 +17 * 6 e)-23+98:7 з)-56: (102-88) к) -32-29 (-3) Задание № 2 )1-×2 27 21 28 21 +2름++ c) (+33)1+ и) 2,19-0,9 * 1,4 к) (4,74+2,4): 1,7 л) 8,6-9,8: 3,5 м) 4,6* (-3,7+5,3) H) 24 * 1,7:6 o) 16,8: 2,4 p) 0,072 x 100 + 1,51

Часть 1

Задание №1

• а) -4 * (12 - 89) = -4 * (-77) = 308
• б) -3 * (24 - 117) = -3 * (-93) = 279
• в) -31 + 12 * 9 = -31 + 108 = 77
• г) -43 + 17 * 6 = -43 + 102 = 59
• д) -69 + 96 : 6 = -69 + 16 = -53
• е) -23 + 98 : 7 = -23 + 14 = -9
• ж) -78 : (53 - 47) = -78 : 6 = -13
• з) -56 : (102 - 88) = -56 : 14 = -4
• и) 29 - 16 * (-4) = 29 + 64 = 93
• к) -32 - 29 * (-3) = -32 + 87 = 55

Задание №2

• а) \[ \frac{12}{17} \times (\frac{11}{24} - \frac{3}{8}) = \frac{12}{17} \times (\frac{11}{24} - \frac{9}{24}) = \frac{12}{17} \times \frac{2}{24} = \frac{12}{17} \times \frac{1}{12} = \frac{1}{17} \]
• б) \[ \frac{9}{35} \times (\frac{7}{24} + \frac{1}{18}) = \frac{9}{35} \times (\frac{21}{72} + \frac{4}{72}) = \frac{9}{35} \times \frac{25}{72} = \frac{1}{7} \times \frac{5}{8} = \frac{5}{56} \]
• в) \[ \frac{25}{27} \div \frac{10}{21} \div \frac{15}{28} = \frac{25}{27} \times \frac{21}{10} \times \frac{28}{15} = \frac{5}{9} \times \frac{7}{2} \times \frac{28}{3} = \frac{5 \times 7 \times 28}{9 \times 2 \times 3} = \frac{5 \times 7 \times 14}{9 \times 3} = \frac{490}{27} = 18 \frac{4}{27} \]
• г) \[ 2 \frac{2}{9} \div \frac{4}{3} + \frac{1}{3} = \frac{20}{9} \times \frac{3}{4} + \frac{1}{3} = \frac{5}{3} \times \frac{1}{1} + \frac{1}{3} = \frac{5}{3} + \frac{1}{3} = \frac{6}{3} = 2 \]
• д) \[ 18 \frac{5}{84} \times \frac{17}{21} = \frac{1517}{84} \times \frac{17}{21} = \frac{25789}{1764} = 14 \frac{1357}{1764} \]
• е) \[ (\frac{4}{7} + \frac{2}{3}) \div \frac{13}{3} = (\frac{12}{21} + \frac{14}{21}) \div \frac{13}{3} = \frac{26}{21} \times \frac{3}{13} = \frac{2}{7} \times \frac{1}{1} = \frac{2}{7} \]
• ж) \[ 1 \frac{3}{4} \times 2 \frac{2}{5} = \frac{7}{4} \times \frac{12}{5} = \frac{7}{1} \times \frac{3}{5} = \frac{21}{5} = 4 \frac{1}{5} \]
• з) \[ 1 \frac{1}{8} + \frac{3}{7} - \frac{47}{56} = \frac{9}{8} + \frac{3}{7} - \frac{47}{56} = \frac{63}{56} + \frac{24}{56} - \frac{47}{56} = \frac{87}{56} - \frac{47}{56} = \frac{40}{56} = \frac{5}{7} \]
• и) 2,19 - 0,9 * 1,4 = 2,19 - 1,26 = 0,93
• к) (4,74 + 2,4) : 1,7 = 7,14 : 1,7 = 4,2
• л) 8,6 - 9,8 : 3,5 = 8,6 - 2,8 = 5,8
• м) 4,6 * (-3,7 + 5,3) = 4,6 * 1,6 = 7,36
• н) 24 * 1,7 : 6 = 40,8 : 6 = 6,8
• о) 16,8 : 2,4 = 7
• п) 0,072 * 100 + 1,51 = 7,2 + 1,51 = 8,71