There are 330 students in the fourth and fifth grades in xinhua primary school, and the number of students in the fifth grade is 1.2 times that of the fourth grade. How many are there in Grade Four and Grade Five?

330÷(11.2)=330÷2.2=150 (person), 330-150=180 (person) A: There are 150 students in Grade 4 and 180 students in Grade 5 respectively.