10.直接写出得数.
$\frac{5}{26}$×$\frac{13}{15}$=
$\frac{2}{9}$×4×$\frac{3}{8}$=
$\frac{13}{18}$×6=
$\frac{2}{3}$+3=
0.375÷37$\frac{1}{2}$=
(1$\frac{1}{2}$-1.5)÷(4$\frac{9}{20}$-1$\frac{3}{10}$)=
1-$\frac{1}{2}$×$\frac{2}{3}$×$\frac{3}{4}$×$\frac{4}{5}$×…×$\frac{99}{100}$=
$\frac{1}{1×2}$+$\frac{1}{2×3}$+$\frac{1}{3×4}$+…+$\frac{1}{98×99}$+$\frac{1}{99×100}$=