Question

найдите значения выражений 4 23*8- 2 13*1 314- 1 3748*2 215

Answer 1

$4 frac{2}{3}*8-2 frac{1}{3} *1 frac{3}{14} -1 frac{37}{48} *2 frac{2}{15}$=$frac{14+8}{3} - frac{7+17}{3+14} - frac{37+32}{48+15} = 7frac{5}{15} -3 frac{6}{15} -2= 1 frac{14}{15}$

Answer 2

Писал долго! ;)

Answer 3

неправильно

Answer 4

$4 frac{2}{3}*8-2 frac{1}{3}* 1 frac{3}{14}-1 frac{37}{48}*2 frac{2}{15}=30frac{13}{18}$ 


$1) 4 frac{2}{3}*8= frac{4*3+2}{3}*8= frac{14}{3}*8= frac{112}{3}$

$2) 2 frac{1}{3}*1frac{3}{14}= frac{2*3+1}{3}*frac{1*14+3}{14}= frac{7}{3}*frac{17}{14}= frac{1}{3}*frac{17}{2}= frac{17}{6}$

$3) 1frac{37}{48}*2frac{2}{15}= frac{1*48+37}{48}*frac{2*15+2}{15}= frac{85}{48}*frac{32}{15}= frac{17}{3}*frac{2}{3}= frac{34}{9}$

$4) frac{112}{3}-frac{17}{6}= frac{2*112-17}{6}= frac{207}{6}$

$5) frac{207}{6}-frac{34}{9}= frac{3*207-2*34}{18}= frac{621-68}{18} =frac{553}{18}=30 frac{13}{18}$