Question

Решите пожалуйста .дается 24 балла

Answer 1

$a);1);frac34cdot1,8cdot1frac15:0,07=frac34cdot1frac45cdotfrac65:frac7{100}=frac34cdotfrac95cdotfrac65cdotfrac{100}7=frac{162}7\2);frac15:0,49cdot2frac58=frac15:frac{49}{100}cdotfrac{21}8=frac15cdotfrac{100}{49}cdotfrac{21}8=frac{15}{14}\3)frac{162}7:frac{15}{14}=frac{162}7cdotfrac{14}{15}=frac{108}5=21frac35=21,6\\b);1);0,2cdot6,2:0,31-frac56cdot0,3=0,2cdot20-frac56cdotfrac3{10}=4-frac14=3frac34=frac{15}4$
$2);2+1frac4{11}cdot0,22:0,01=2+frac{15}{11}cdotfrac{11}{50}:frac1{100}=2+frac{15}{50}cdot100=2+30=32\3);frac{15}4:32=frac{15}4cdotfrac1{32}=frac{15}{128}\\c);1);12,75cdotfrac4{25}cdot1,8=12frac34cdotfrac4{25}cdotfrac95=frac{51}4cdotfrac4{25}cdotfrac95=frac{459}{125}\2);1frac12cdot2,04:20=frac32cdotfrac{51}{25}cdotfrac1{20}=frac{153}{1000}\3);frac{459}{125}:frac{153}{1000}=frac{459}{125}cdotfrac{1000}{153}=24$

$d);1);left(1,75cdotfrac25+1,75:1right)cdot1frac57=1,75cdot1frac25cdot1frac57=frac74cdotfrac75cdotfrac{12}7=frac{21}5\2);left(frac{17}{40}-0,325right):frac15cdot0,4=left(frac{17}{40}-frac{13}{40}right)cdot5cdotfrac25=frac4{40}cdot2=frac15\3);frac{21}5:frac15=frac{21}5cdot5=21$