Question

Упростить выражения

4/21*7/15*15/16n        и       1 4/9*1 9/13x*1 7/11

Answer 1

$frac{4}{21}cdotfrac{7}{15}cdotfrac{15}{16}n=frac{4cdot7cdot15}{21cdot15cdot16}n=frac{1cdot1cdot1}{3cdot1cdot4}n=frac{1}{12}n$

 

$1frac{4}{9}cdot1frac{9}{13}xcdot1frac{7}{11}=frac{13}{9}cdotfrac{22}{13}xcdotfrac{18}{11}=frac{13cdot22cdot18}{9cdot13cdot11}x=frac{1cdot2cdot2}{1cdot1cdot1}x=4x$