Вычислите:
2/[tex]\frac{4}{19}[/tex] + 1[tex]\frac{5}{7}[/tex] * ([tex]\frac{2}{9}[/tex] - 3[tex]\frac{7}{18}[/tex]
2/[tex]\frac{4}{19}[/tex] + 1[tex]\frac{5}{7}[/tex] * ([tex]\frac{2}{9}[/tex] - 3[tex]\frac{7}{18}[/tex]
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Ответ:
Пошаговое объяснение:
1) 2/9 - 3. 7/18 = 4/18 - 3. 7/18 =
-3. 3/18 = -3. 1/6
2) 1. 5/7 * (-3. 1/6) = 12/7 * (-19/6) =
2/7 * (-19/1) = -38/7 = -5. 3/7
3) 2 : 4/19 = 2 * 19/4 = 38/4 =
9. 2/4 = 9. 1/2
4) 9. 1/2 + (-5. 3/7) = 9. 1/2 - 5. 3/7 =
9. 7/14 - 5. 6/14 = 4. 1/14