1. Add all even numbers between 31 and 37.
  2. If a 250-L tank is 7/10 full, how much more could it hold.
  3. Which is larger, 77.7 or 77 7/100?
  4. Decrease 1 426 231 by 400 000.
  5. How many 2-cm cubes could fit into a box with length 8 cm,

width 4 cm and height 10 cm?