Math Balloon Shooter

Balloon Math Shooter is a terrific math puzzle game that will beef up you basic math skills in a fun way! After solving a problem you should shoot at balloon with a number that is a solution of a math problem. If you will shoot at wrong balloon you will get a negative score. Each level brings harder sums to solve. At first you need to solve a math problem given in the left upper corner.
After solving a problem you should shoot at ballon with a number that is a solution of a math problem. If you will shoot at wrong balloon you will get a negative score.
If you have enough points after 45 seconds of beggining of a round you will go to the next level.
This game has four levels. Each level has the range of numbers that the problem can be constructed from.
First level has problems constructed from the range of numbers from 0+0 to 10+10.
Second level has problems constructed from the range of numbers from 0+0 to 20+20.
Third level has problems constructed from the range of numbers from 0+0 to 50+50.
Fourth level has problems constructed from the range of numbers from 0+0 to 100+100.