Question

Помогите сделать дз 16 и 19 задание

Answer 1

$16.$

$1) \: \: \: \: \: \frac{25}{49} \times \frac{21}{50} = \frac{3}{14}$

$2) \: \: \: \: \: \frac{45}{64} \div \frac{81}{96} = \frac{45}{64} \times \frac{96}{81} = \frac{15}{18} = \frac{5}{6}$

$3) \: \: \: \: \: \frac{121}{140} \times \frac{350}{363} = \frac{5}{6}$

$4) \: \: \: \: \: \frac{39}{203} \div \frac{78}{145} = \frac{39}{203} \times \frac{145}{78} = \frac{145}{406}$

$5) \: \: \: \: \: 22 \frac{6}{7} \times 2 \frac{11}{40} = \frac{160}{7} \times \frac{91}{40} = 4 \times 13 = 52$

$6) \: \: \: \: \: 42 \frac{2}{3} \div 4 \frac{20}{27} = \frac{128}{3} \div \frac{128}{27} = \frac{128}{3} \times \frac{27}{128} = \frac{27}{3} = 9$

$19.$

$1) \: \: \: \: \: \frac{2}{47} \times 9.4 + 5.6 = \frac{2}{47} \times \frac{94}{10} = 0.4 + 5.6 = 6$

$2) \: \: \: \: \: 2.1 - 6.2 \times \frac{3}{31} = 2.1 - \frac{62}{10} \times \frac{3}{31} = \frac{21}{10} - \frac{6}{10} = \frac{15}{10} = 1.5$

$3) \: \: \: \: \: 5.8 \div 9 \frac{2}{3} + 8.04 = \frac{58}{10} \div \frac{29}{3} + 8.04 = \frac{58}{10} \times \frac{3}{29} + \frac{804}{100} = \frac{6}{10} + \frac{804}{100} = \frac{60 + 804}{100} = \frac{864}{100} = 8.64$