Question

(7-4 3/4)*1 1/3+(6-4 2/5):1 1/3=
помогите пожалуйста

Answer 1

$\left(7-4\frac34\right)\cdot1\frac13+\left(6-4\frac25\right):1\frac13=\left(\frac{28}4-\frac{19}4\right)\cdot\frac43+\left(\frac{30}5-\frac{22}5\right):\frac43=\\=\frac94\cdot\frac43+\frac85\cdot\frac34=3+\frac65=\frac{15}5+\frac65=\frac{21}5=4\frac15=4,2$