4 tấn rưỡi = 4500 kg=>> 4500 + 50 = 4550 kg
4 tấn ruồi+50kg=44550 kg ruồi = 4,55 tấn ruồi
mình không biết có đúng ko nếu sai mong bạn thông cảm
4550 đó 10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000%