Question

Как решить 1/2-1/3+1/7-2 целых 1/3=

Answer 1

1/2+1/7-1/3-2 1/3=1/2+1/7-2 2/3=21/42+6/42-2 28/42=
=27/42-2 28/42=-2 1/42

Answer 2

$\mathtt{ \dfrac{1}{2}- \dfrac{1}{3}+ \dfrac{1}{7}-2\dfrac{1}{3}= \dfrac{1}{2}- \dfrac{1}{3}+ \dfrac{1}{7}- \dfrac{7}{3}= \dfrac{21-14+6-7*14}{42}= -\dfrac{85}{42}=}\\\mathtt{=-2 \dfrac{1}{42} }$