Question

упростите выражение: 4/15(1 2/3н-4,5)-1 1/2(8/27н+5,4)

Answer 1

$\frac{4}{15} (1 \frac{2}{3} n - 4.5) - 1 \frac{1}{2} ( \frac{8}{27} n + 5.4) = \frac{4}{15} ( \frac{5}{3} n - \frac{45}{10} ) - \frac{3}{2} ( \frac{8}{27} n + \frac{54}{10} ) = \frac{4 \times 5}{15 \times 3} n - \frac{4 \times 45}{15 \times 10} - \frac{3 \times 8}{2 \times 27} n - \frac{3 \times 54}{2 \times 10} = \frac{4}{9} n - \frac{6}{5} - \frac{4}{9} n - \frac{81}{10} = - \frac{12 + 81}{10} = - \frac{93}{10} = - 9.3$