You can loose belly fat with exercises but also you have to take care of your diet simultaneously.Go for aerobic exercises as they lead to the calorie expenditure causing weight loss.Aerobic exercises can be done by walking,running,jumping,cycling etc.Also include strength training to your exercise session to tone up the fat loosen muscle.For strengthening and toning exercises like crunches,long arm crunches,twist crunches,oblique crunches etc.should be done.