Question

Va rog dau coroana și puncte!!

Answer 1

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Answer 2

$3) \\ \\ (3,45 + 8,21) - (2,19 + 4,37) = ( \frac{583}{80}) - ( \frac{164}{25}) = \frac{51}{10} = 5,1 \\ \\ 4) \\ \\ 4.25 - 0.2 \times 3,8 - 1,03 = \frac{17}{4} - \frac{19}{25} - \frac{103}{100} = \frac{123}{50} = 2,46 \\ \\ 5) \\ \\ 6,73 - 0,8 \times (7,45 - 5,47) = \frac{673}{100} - \frac{198}{125} = \frac{2573}{500} = 5,146 \\ \\ 6) \\ \\ {8,7}^{2} - {3,3}^{2} = \frac{7569}{100} - \frac{1089}{100} = \frac{324}{5} = 64,8 \\ \\ 7) \\ \\ (0.0075 \times 100)^{2} + (12:100)^{2} = \frac{9}{16} + 9:625 = 0,5769 \\ \\ 8) \\ \\ {0,8}^{2} - {0,7}^{2} + {0,6}^{2} - {0,5}^{2} = \frac{16}{25} - \frac{49}{100} + \frac{9}{25} - \frac{1}{4} = \frac{13}{50} = 0,26 \\ \\ 9) \\ \\ \frac{2}{5} \: din \: 60 = 60:5 \times 2 = 12 \times 2 = 24 \\ \\ \frac{3}{8} \: din \: 24 = 24:8 \times 3 = 3 \times 3 = 9 \\ \\ 10) \\ \\ (3 - 2,8194) + (3 - 1,1806) = ( \frac{903}{5000}) + ( \frac{9097}{5000}) = \frac{10000}{5000} = 2 \\ \\ 11) \\ \\ 13,9 - 10,3 = 3,6 \\ \\ 19,72 + 3,6 = 23,32 \\ \\ 12) \\ \\ a + b = 11,3344 \\ \\ a = 1,2 \times b = 1,2b \\ \\ 1,2b + b = 11,3344 \\ \\ 2,2b = 11.3344 \\ \\ b = 5,152 \\ \\ a = 1,2 \times 5,152 = 6,1824 \\ \\ ottomila \: e \: dieci = 8010$