7. On the first day are sold  on on the second day  25 % from all apples what were in the shop. How big amount of apples is already in the shop?

8. There are 360 students in the school. In spring left 22 students. How many % lesser the amount of students?

9. There are 15 boys in this class. It is   from all students of this class. How many students in this class? 

10. Vary.

    15 m = ........ cm                            24 dm = ........... m
    0,21 km = ........... m                       17 mm = ............. m
    145,2 m = ........... cm                     0,004 m = ...........cm
    2 dm² = .............cm²                       0,65 m² = ........... dm²
    21,4 cm² = ............m²                     1450 mm² = ............dm²
    34 ha = ..............m²                        2 a = ............ m²

11. Draw the triangle KLM. Check point A in this triangle. Draw lines through this point.