Question

Решите плиз плиз решите

Answer 1

$3frac{1}{3}cdot6-5.5cdot2frac{5}{11}=frac{10}{3}cdot6-5.5cdotfrac{27}{11}=20-13.5=6.5$

$1frac{2}{3}:5+0.175cdotfrac{20}{7}=frac{5}{3}cdot frac{1}{5}+frac{3.5}{7}= frac{1}{3}+ frac{1}{2}=frac{2}{6}+ frac{3}{6}= frac{5}{6}$

$1.75-1frac{11}{17} cdotfrac{51}{56} =1.75-frac{28}{17} cdotfrac{51}{56} =1.75-frac{28}{17} cdotfrac{51}{56} =1.75-1.5=0.25$

$(0.3-frac{3}{20} )cdot1frac{1}{2} =(frac{3}{10}-frac{3}{20} )cdotfrac{3}{2} =(frac{6}{20}-frac{3}{20} )cdotfrac{3}{2} =frac{3}{20} cdotfrac{3}{2} =frac{9}{40}$

Answer 2

№38   =10/3 х6 -5,5 х 27/11 = 20 - 0,5 х 27 = 20 - 13,5 = 6.5

№39.  = 5/3 + 0,175 х 20/7 = 1/3 + 0,5 = 1/3 + 1/2 = 5/6

№40.  = 1,75 - 28/17 х 51/56 = 1,75 - 3/2 = 7/4 - 3/2 = (7-6)/4 = 1/4 = 0,25.

№41.  = (3/10 - 3/20) х 3/2 = (3х3)/(20х2) = 9/40