составь задачу по выражению и реши ее 30+(30-8) 

Write what they are going to do.

1.He ................................................. visit London.

2.She ............................................... stay at that hotel.

3.They .............................................. meet the group.

4.I .................................................... (e,i,v,d,r) a car.

5.We ...................................................(a,e,k,t) an exam

6.I ..................................................... arrange everything.

7.My friends ................................ help me.

8.My friend ................................... spend the weekend in the country.

9. The boys ......................................make a fire.

10.The student ....................................... (u,y,s,d,t) German.

А)    (-3/4 + 2/3)*(-3/4-2/3)=?

Б)     -3/4+2/3*(-3/4-2/3)=?

сколько звуков в слове большом?

вычислите массу кислорода выделившегося в результате разложения порции воды массой 9 г