How many class hours are there in the first volume of the fourth grade?
Hebei Education Edition Grade Four Mathematics I * * Volume I 12 class hours. In the fourth grade, the first volume of Hebei Education Edition arranged 7 class hours of division, 3 class hours of multiplication and division, exploring heaven 1 class hour, and comprehensively applying 1 class hour. 7+3+1+1= 12 Therefore, the first volume of mathematics in the fourth grade of Hebei Education Press 1 * * has12 class hours.