Question

Вычислить:
1) 3 5/12 - 1 17/18
2)5 1/2 * (-3 1/22)
3) (-1 2/3) * (-0,4)

Помогите срочно плез!!!!!

Answer 1

Решение:

$ttdisplaystyle 1); [3frac{5}{{12}} - 1frac{{17}}{{18}} = 3frac{{15}}{{36}} - 1frac{{34}}{{36}} = 2frac{{51}}{{36}} - 1frac{{34}}{{36}} = 1frac{{17}}{{36}}]$

$ttdisplaystyle 2): [5frac{1}{2}*left( { - 3frac{1}{{22}}} right) = frac{{11}}{2}*left( { - frac{{67}}{{22}}} right) = frac{1}{2}*left( { - frac{{67}}{{2}}} right)=-frac{{67}}{{4}}=-16frac{3}{{4}}]$

$ttdisplaystyle 3):[left( { - 1frac{2}{3}} right)*left( {-0,4} right) =left( {-frac{5}{3}} right)*left( {-frac{4}{{10}}} right)= left( {-frac{5}{3}} right)*left( {-frac{2}{5}}right)=frac{2}{3}]$