Question

(5^-101-5^-103):(1,2*5^-102)=?

Answer 1

$(5 {}^{ - 101} - {5}^{ - 103} ) \div (1.2 \times 5 {}^{ - 102} )$

$( \frac{1}{5 {}^{101} } - \frac{1}{ {5}^{103} } ) \div ( \frac{6}{5} \times 5 {}^{ - 102} )$

$\frac{ {5}^{2} - 1 }{5 {}^{103} } \div \frac{6 \times 5 {}^{ - 102} }{5}$

$\frac{25 - 1}{5 {}^{103} } \times \frac{5}{6 \times 5 {}^{ - 102} }$

$\frac{24}{5 {}^{102} } \times \frac{1}{6 \times 5 {}^{ - 102} }$

$\frac{4}{5 {}^{102} } \times \frac{1}{5 {}^{ - 102} }$

$\frac{4}{1}$

$4$