The "experimental class" has fewer problems than "learning tyrants" and is more suitable for first-grade children. "Three-year simulated five-year senior high school entrance examination" is only designed for junior high school students in grades seven, eight and nine, and is not suitable for freshmen.
The advantages of "experimental class" are: reading textbooks point by point and gradient expanding and optimizing training. The perfect combination of curriculum reform, independent preview, classroom interaction and independent exploration after class makes it easier for children to learn and accept.
1, perimeter and area formula of rectangle and square:
The circumference of a rectangle = (length+width) กม2 C=(a+b)กม2.
Circumference of